美语听力练习素材:喀麦隆烧毁走私象牙

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例句：The second felt the elephant's tusk.
第二个瞎子摸到了大象的象牙。

2.drinking water 饮用水

例句：What about plutonium in the drinking water?
钚会不会存在于饮用水里呢？

3.tamper with 篡改，摆弄

例句：Someone has been tampering with the machine.
有人乱动了这台机器。

4.front-runner 领先者

例句：Neither of the front-runners in the presidential election is a mainstream politician.
这次总统选举中的两个领先者都不是主流政客。