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seen在该句中是怎么用的?

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wininghe 发表于 11-12-8 20:13:02 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
It is important to note that negative effects seen when taking active substances, reported as drug side effects, can often be at least partly attributed to a a combination of effects from the substance’s constituents (specifics), and those from nocebo effects (non-specifics).

达人分析一下吧 谢谢
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