When he entered the tenth grade, he became a vocational technical institute student.

当他进入十年级时，他成为了一名职校学生。

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Furthermore, highway network mostly is the trouble of technical grade and service low.

中小城市的道路网普遍存在着公路网技术等级低、服务水平差等问题。

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Phosphoric acid is grouped as four kinds by its production method, that is agricultural grade, technical grade, food grade and semiconductor grade.

磷酸按生产方法可分为热法磷酸和湿法磷酸，按用途可分为农业级、工业级、食品级和半导体级磷酸。

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