慢速英语:Americans love Christmas trees

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1. estimate vt.估计，估算
例句：That estimate seems unrealistically low to me.
上述估计在我看来低得有些离谱。

2. environment n.环境，外界
例句：What a terrible working environment.
工作环境太糟糕了。

3. recycle vt.回收利用; 使再循环
例句：But that doesn't necessarily mean people will recycle those items.
但这并不意味着人们就一定会回收它们。

4. reuse vt.再用，重新使用
例句：We're the only country in the world that doesn't reuse its nuclear byproducts.
我们是这个世界上唯一不重复利用核副产品的国家。

5. remain vi.留下; 保持
例句：Unemployment will remain structurally high.
失业率仍然保持结构性高位。