重点讲解:
1. gobble up 狼吞虎咽;贪婪地吃;
The boy gobbled up an ice-cream cone.
那个男孩大口大口地吃完了一个蛋卷冰淇淋 。
2. stay behind 留下;
He found it unnecessary for us to st ay behind.
他感到我们不必要留下来 。
3. dry out (使)变干;(使)干透;
Environmentalists say that diverting water from the river will lower the water table and dry out wells.
环保主义者称引流河水会导致地下水位下降和水井干枯 。
4. when it comes to 谈到;涉及;
They are inexperienced when it comes to decorating.
说到装修,他们就没有什么经验了 。
adj. 不必要的,多余的