英音听力讲解:朝鲜否认生产使用化学武器

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短语讲解：

1. The driver later crashed and was arrested as he fled on foot.

on foot 徒步; 步行，进行起来
例句：I go to school usually on foot.
我上学通常是走路去。

2. And an American nursery teacher has spoken of her delight in being able to save a five-year-old pupil’s life by providing the child with one of her own kidneys.

be able to 能够
例句：They may be able to help with childcare so that you can have a break
他们可以帮忙照料孩子，这样你就可以歇一歇了。