Release discharge bolt to discharge the retained water if the pump will not be used for long.

长期停止使用时，应打开放水螺塞，将泵内的剩水排尽。

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Scientists warn the wetlands are losing the lining that once retained water, with deep cracks opening up in the worst areas.

科学家们对此提出警告，他们表示，湿地正渐渐失去它保持水分的那一层，而有些地方甚至已经露出了深深的裂缝。

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The net result is that with normal tissues with their unrestricted diffusion with lost signals will look dark whilst tumors with their retained water signals will look bright.

净结果是正常组织水分子弥散不受限制从而迅速丢失信号，看起来是暗的；而肿瘤看起来是明亮的。

youdao

The amount of water retained in soils tends to range from about 5% to about 45-50%.

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