The researchers don't make causal links, though they caution that loud sound exposure from listening to music might be particularly significant to adolescents.
尽管研究人员警告，对青少年听力损伤问题而言，听音乐时喧闹外放的声音非常关键，但他们仍未确定其中的因果关系。
But they caution that the study covers less than a quarter of world fisheries, and lightly to moderately fished and rebuilding ecosystems comprise less than half of those.
但是他们提醒说，研究只涵盖了世界不到四分之一的渔场，少量或适度捕捞并正在恢复的生态系统不足其中的一半。
However, they caution that there are likely to be other ways that cancers can develop resistance.
然而，他们也警告说癌症有可能是以其他方式来产生耐药性。
They caution that a child's skin is especially sensitive to heat and also recommend laptop warning labels.
他们告诫孩子的皮肤是对热量特别敏感的，还建议手提电脑贴上警告标示。
They caution that parents who are giving these supplements to children should be aware of the possible damaging consequences of long-term, high dose administration.
他们警告说，那些给予儿童补充上述物质的父母要小心，长期、高剂量的补充上述物质可能会对儿童造成伤害。
They caution that parents who are giving these supplements to children should be aware of the possible damaging consequences of long-term, high dose administration.
他们警告说，那些给予儿童补充上述物质的父母要小心，长期、高剂量的补充上述物质可能会对儿童造成伤害。
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