xuqiulin

1. 只有得到教师的许可学生才可以进入这个房间。
the students can into this room only if get the permission from teacher
2. 座椅安全带只有调节好才能起作
sealt belt are effective only if they are correctly adjusted
3. 我们双方只有开诚布公来谈才能达成协议。
we can come to agreement only if