• Periodic checks are carried out on the equipment.

    设备定期进行检查

    《牛津词典》

  • Periodic checks are taken to ensure that high standards are maintained.

    进行周期性检查确保高标准得以维持。

    《柯林斯英汉双解大词典》

  • Early versions of the periodic table had gaps, missing elements.

    早期元素周期表空缺缺少一些元素

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  • Professor Harrison, were you saying that the periodic table is predictive?

    哈里森教授周期表可以预测的吗?

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  • There is this group of about half a dozen right down the diagonal middle of the periodic chart.

    沿着周期表对角线中间大约包含六个元素的元素

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  • Of course, it was an element the periodic table let us to expect existed before anyone had found it or made it.

    当然发现制造,就是一种元素周期表使得我们期待存在的元素。

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  • In fact, subsequent work has shown that in a periodic table, elements should not be ordered strictly by atomic mass.

    事实上后来研究已经证明元素周期表中,元素应该严格按照原子质量来排序

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  • By isolating organisms completely from external periodic cues, biologists learned that organisms have internal clocks.

    通过生物体外部周期信号完全隔离生物学家了解到生物体内部的生物钟。

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  • Online time has doubled since 2006, and social media use has moved from a periodic activity to a daily one in the same period.

    2006年以来,上网时间翻了一番,而同时,社交媒体使用已经定期活动变成了日常活动。

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  • Bone growth in reptiles is periodic in nature, producing a series of concentric rings in the bone, not unlike the growth rings of a tree.

    爬行动物骨骼生长本质上周期性的,在骨头产生一系列同心圆树木年轮一样。

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  • Yet Rampino and others question one of the traditionalists' basic assumption: the periodic occurrence of glaciation throughout Earth's history.

    然而,兰皮诺其他人传统主义者基本假设提出质疑在整个地球历史中,冰川期是周期性发生的。

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  • In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps.

    一些地方水位每年一米速度下降需要定期加深使用更强大的水泵

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  • Warmer sea temperatures caused by climate change and periodic El Nio events have caused large areas of coral to be wiped out in so-called "bleaching" events.

    气候变化周期性厄尔尼诺现象引起海水变暖已经造成大面积珊瑚礁所谓的“漂白”事件中消失殆尽。

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  • Consequently, the timing and rhythms of biological functions must closely match periodic events like the solar day, the tides, the lunar cycle, and the seasons.

    因此生物功能时间节奏必须太阳日潮汐月球周期季节等周期性事件密切契合

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  • However, when diatoms are observed under constant conditions in a laboratory, they still display periodic behavior, continuing to burrow on schedule for several weeks.

    然而实验室恒定条件观察硅藻时,它们仍然表现出周期性行为继续按计划挖掘几个星期

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  • Both chemists were sufficiently farsighted to leave gaps where their analyses of periodic physical and chemical properties indicated that new elements should be located.

    这两位化学家非常有远见,他们周期性物理性质化学性质进行分析,并在预示应该出现元素地方留下了空位

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  • Periodic surges of intense Iranian economic nationalism must be understood partly as a reaction to the close relations between British business in Iran and the British government.

    伊朗强烈经济民族主义周期性高涨一定程度上必须理解英国伊朗商业英国政府之间密切关系的反应

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  • Does that explain why it was missing in the periodic table?

    能解释为什么元素周期表中缺失吗?

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  • For example, tellurium comes before iodine in the periodic table, even though its atomic mass is slightly greater.

    例如元素周期表中,排在之前尽管原子质量略大一些。

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  • Let's continue our discussion now by talking about orbits, especially those of the so-called periodic-orbit comets.

    现在我们继续讨论谈谈轨道特别是那些所谓周期轨道彗星。

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  • The close correspondence between the observed properties of gallium and Mendeleyev's predictions for eka-aluminum lent strong support to the periodic law.

    表现出性质门捷列夫“铝下元素”预测密切对应,为周期律提供了有力的支持

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  • Esplanade Company uses the periodic inventory method.

    散步路公司使用定期盘存方法

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  • The bordereaux are periodic reports or settlement statements.

    业务报表定期报告和解声明。

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  • The dangerous value of the control parameter led to surf-riding and the domain of periodic motion and surf-riding given.

    控制参数危险导致滑行,并给出了周期性运动滑行的范围

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  • Signaled by periodic time interval.

    定时时间间隔触发信号

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  • Operating systems need periodic updates.

    操作系统需要定期更新

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  • The cycles are periodic and optional.

    循环阶段性可选择的。

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  • The cycles are periodic and mandatory.

    循环阶段性强制性的 。

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  • Figure 6 shows periodic long connect times.

    6显示周期性地出现连接时间较长的现象。

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  • Scheduling table for periodic elements.

    阶段性元素的日程安排表。

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