为了防止觅食队伍利用气味线索，他们采取了周密的预防措施。
Elaborate precautions were taken to prevent the foraging team using odour clues.
如果我们防止血管新生就可以预防癌症。
If we want to prevent angiogenesis, that could prevent cancer.
防止头部受伤是预防外伤后癫痫的最有效方法。
Preventing head injury is the most effective way to prevent post-traumatic epilepsy.
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