1.back and forth 反复地，来回地

The old man, still pacing back and forth, ceased to speak aloud, and began to mutter.

老人仍在来回踱步，不再大声说话，开始喃喃自语起来Ug%]fDRMmbiWL(|hT。

2.accustom oneself to 使……习惯于

A good traveler can accustom himself to almost any kind of food.

一个善于旅行的人几乎能使自己习惯于任何一种食物RTog7vW!~X.7yUm。

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