R-4：remain/keep at arm's length 保持距离
A:Peter and you should remain at arm's length.
A:彼得和你应该保持些距离。
B:I don't know what you mean. Anything wrong?
B:我不明白你的意思，有什么不对劲吗？
A:You are single, but he has had a family. You should avoid the gossip.
A:你还单身，但他已有了家庭，你应该避免一些闲话。
B:How unreasonable!
B：岂有此理！
