He's been chewing away on that gum for hours.

他一连几个小时都在嚼口香糖。

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While he was still chewing away the first dwarf came back and announced that the sledge was ready.

他还在那儿咬啊嚼啊，第一个小矮人已回来报告雪橇准备好了。

youdao

Like termites chewing away at the foundation of a strong building, doubt can undermine our strongest beliefs.

就像啃食大厦基座的白蚁，怀疑会暗中破坏我们最坚定的信仰。

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The saliva produced in the mouth by the physical act of chewing can wash away acids and bacteria, thereby protecting teeth.

CNN: Chew on this: Gum may be good for body, mind