两岁幼儿吸收（防腐剂）对羟基苯甲酸丙酯和对羟基苯甲酸丁酯类防腐剂的数量可能会产生类雌激素风险，导致内分泌系统障碍。

The amounts that two-year-olds absorb from the [preservative] parabens propylparaben and butylparaben can constitute a risk for oestrogen-like disruptions of the endocrine system.

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上述条件下，对羟基苯甲酸乙酯的产率为87.5%，对羟基苯甲酸丙酯的产率为89.2%，对羟基苯甲酸丁酯的产率为91.1%。

Under these conditions, yields of 87.5%, 89.2%and 91.1%can be reached for the ethyl ester, propyl ester, and butyl ester, respectively.

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上述条件下，对羟基苯甲酸乙酯的产率为87.5%，对羟基苯甲酸丙酯的产率为89.2%，对羟基苯甲酸丁酯的产率为91.1%。

Under these conditions, yields of 87.5%, 89.2%and 91.1%can be reached for the ethyl ester, propyl est...

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