易混淆的单词： Lice

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Lions and lice don 't waver in their course .

狮子和虱子都不会改变自己的本性。

Surprisingly , lice once again furnish the answer .

令人惊讶的是，虱子再一次为这个答案提供了信息。

The new approach rests on reconstructing the family tree of lice .

这种新的方法要借助对虱子系统树的重建。

If their host evolves into two species , the lice will do likewise .

如果它们的寄主演化为两种物种，那么虱子也将如此。

But this is difficult to do with lice , for which almost no fossils are known .

但是这就虱子来说就非常困难，因为几乎没有发现过它的化石。