易混淆的单词： PMspms

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The exact causes of pms are not fully understood .

经前综合症的确切病因尚未完全了解。

Pms is a collection of symptoms .

经前综合症是一个症候群。

Pms was originally seen as an imagined disease .

经前综合症最初被看作是一种想象的疾病。

The study of pms symptoms is not a new development .

对经前综合症各种症状的研究并不是一个新生事物。

Some medical professionals suggest that pms might be a socially constructed disorder .

有些医学专家认为经前综合症可能是一种社会建构出来的疾病。