常速英语:消防员的日常 了解一下

1. Today, more than 30 people work at the base. All of them are experienced firefighters who have to master parachute jumping for the job.

master vt. 掌握

Duff soon mastered the skills of radio production.
达夫很快掌握了广播节目制作的技能。

2. Putting on all the gear is complicated, so these men always work in pairs.

in pairs 组队，成双

Almost all of our genes come in pairs, with one being inherited from each parent.
我们携带的几乎所有基因都是成对的，分别遗传自父亲和母亲。

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