科学家还发现，大自然似乎对女孩有另一种促进作用。
Scientists have also found that nature seems to give another boost to girls.
女生更有可能经常发言，并对课堂有重要的促进作用。
Girls are more likely to speak up frequently and make significant contributions to classes.
研究者认为：肌氨酸对肿瘤的转移有促进作用而且是未来潜在开发新药的靶点。
The research suggests that sarcosine plays a role in helping cancer to spread, and may be a potential target for future new drugs.
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