相好的英文：
be on intimate terms with; mistress

参考例句：

Brangwen's girl had put on a ladylike manner, but her voice betrayed her
布兰文相好的那位姑娘也摆出了一副贵妇人的姿态，可是一说话便暴露了她的真实身份。

They have been on familiar terms for a long time.
他们已经相好好久了。

You just can't afford to let her hang-ups cheapen our relationship
你也不应该毫不容情地让她成为阻止我们相好的障碍。

She hid a former lover, now on the lam from Dartmoor.
她把从达特莫潜逃来的一个旧相好藏起来了。

intimate是什么意思：
adj. 熟悉的；亲密的；个人的；秘密的；怡人的；精通的
n. 知己，密友
v. 暗示；提示

Both felt that they are very intimate.
二人都认为他们亲密无间。

I have an intimate knowledge of the facts.
我熟知那些事实。

It is very difficult for one to have an intimate friend.
一个人要有一个莫逆之交很难。

terms是什么意思：
n. 条件；表达方式，措辞，说法；地位，关系；条款；术语

It is a contradiction in terms.
这在措词上是自相矛盾的。

Hip is short term and earnest is long term.
时髦是短暂的，真诚是长远的。

extreme term of proportion
比例外项

mistress是什么意思：
n. 主妇，女主人，情妇

She affirmed that the British laundress was not a mistress of her art
她还断言，英国的洗衣妇没有掌握这一行的本领。

Milton begins by addressing not a fair mistress or a blooming rose.
弥尔顿并没有以美丽的少妇或者盛开的玫瑰开头。

He procured girls of 16 and 17 to be mistresses for his influential friends.
他介绍了些十六七岁的女孩给他那些有权势的朋友当情人。