The reasons accountable for the decline of the fish resources are due to the low reproduction capacity and the long development time of the fish, overfishing and water pollution.

造成胭脂鱼资源下降的原因主要与其自身繁殖力低，发育时间长，以及过度捕捞和水域污染等因素有关。

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It universally exists that injected pressure is high in a long time, injected water volume is low, the difference of injected pressure of each well is very large during oilfield development.

开发过程中普遍存在注水井长期注入压力居高不下、注入量低、单井注入压力差异大等问题。

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Water - washing and dehydrating steps in the old process are left out in the new one, of which the main advantages are: no sewage discharge. low energy consumption, less time and low oil loss.

该技术省掉植物油间歇双漂老工艺中的水洗和脱水工艺，使漆用植物油的精制处理无污水排放，节能，省时，降低油耗。

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They will be closed only for short periods of time and only during the winter when the water temperature and light are too low for algal blooms.

ECONOMIST: Flood barriers