视频对白：
My country permitted your operatives to raid Ali's apartment on condition that I would be involved in this investigation.
我们国家允许你们搜查阿里的公寓，其前提条件就是允许我参与调查。

I understand your frustration, Mr. Auda.
我明白你的沮丧，奥达先生。

今天我们要学习的词组为：on condition that

意为“ 如果；在...条件下”。

例句：
1. He can use the bicycle on condition (that) he returns it tomorrow.
自行车可以借给他，条件是明天必须归还。

2. He has been granted his freedom on condition that he leaves the country.
他已获准恢复自由，条件是他离开这个国家。

3.You can use the bicycle on condition that you return it tomorrow.
只要你明天归还，自行车你可以拿去用。