Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.
因为在二十世纪五十年代左右，可能是四十年代末期，人们开始发现锂，尽管不参与人体的正常生理活动，但是它确实会对我们的身体产生影响。
Dry eye is a disease of ocular surface attributable to different disturbances of the natural function and protective mechanisms in the external eye.
干眼症是一种由各种不同的功能和眼表保护机制紊乱所致的眼表疾病，它是眼科中发病率最高的眼表疾病之一。
Because crying is a natural function of the human organism which is designed to restore the emotionally disequilibrated person to a state of equilibrium.
因为哭是人体机体的一种自然功能，原本用来使感情失衡的人恢复到平衡状态。
Clinical study Objective: Investigate the situation of CP patient's natural function and analyse the rule of producing and changing to guide clinical treatment.
临床研究目的：调查慢性前列腺炎患者的性功能状况，分析其产生变化的原因，指导临床治疗。
Clinical study Objective: Investigate the situation of CP patient's natural function and analyse the rule of producing and changing to guide clinical treatment.
临床研究目的：调查慢性前列腺炎患者的性功能状况，分析其产生变化的原因，指导临床治疗。
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