音频内容：

train

训练；培训

I train myself to speak good English.

我训练自己说一口流利的英语。

They train dogs to sniff out drugs.

他们训练狗嗅出毒品。

train

火车

I like traveling by train.

我喜欢乘火车旅行。

I have to go there by train.

我得坐火车去那。

a train of thought

思路；思绪

The phone ringing interrupted my train of thought.

电话铃声打断了我的思路。

trainer

培训师

He is a trainer.

他是一个培训师。

trainee

接受培训的人

There are fifteen trainees in total.

一共有15个人接受培训。

training

培训

I am taking a training course.

我在参加一个培训课程。