broach for deep hole

例句：

1. 1.She broached the subject delicately.
   她小心翼翼地提起了这个主题。
2. 2. The lock was too tight to broach with a key.
   这把锁太紧了，用钥匙也打不开。
3. 3.He broached the topic of politics during their conversation.
   他们在谈话中谈到了政治话题。