过去这一比例是30%，不过交通部也会给予一些免除条款。

The previous floor was 30 percent, though the ministry could grant certain exemptions.

youdao

过去这一比例是30%，不过交通部也会给予一些免除条款。

The previous floor was 30 percent, though the ministry could grant certain exemptions.

youdao