retain，reserve都是保留的意思，但是后面加的宾语却不同，能分别说几个常见的搭配吗？

retain: 保留[持],不忘,记住;雇用, 聘请(律师等)
e.g. Eliminate the false and retain the true 去伪存真
retain one's presence of mind 镇定自若.
retain an appearance of youth 保有年轻的外貌.

由此看出,retain的主要强调的是"保留原有的"

reserve:储备; 贮藏; 保存保留; 留下(出, 给)推迟; 延迟预定[约]; 租定,预定(座位, 房间等).
be reserved for 留作, (专)供...之用
with reserve 有保留
without reserve 无保留

由此看出,reserve主要强调"预留以备用".
e.g. I will make sure the hotel reserve a room for us .
Reserve oil to prepare against war.

Retain

retain 较正式, 强调“继续保持”, 特指“保持使不失去或被夺走”

如：He has managed to retain most of his fortune. 他设法保存了他的大部分财产。
She retains a good memory of her childhood.

Reserve

reserve 指“为一目的保持, 或保存一段时间”

如：A great future is reserved for you. 光明的前程在等待着你。
I reserved three rooms at the hotel.