At the same time, he is reserved and doesn't always like to talk about himself.

与此同时，他被保留，并且不总是喜欢谈论自己。

youdao

He is very reserved. He does not say much.

他是个拘谨的人，不爱多说话。

《新英汉大辞典》

Even if the child is reluctant, he knows that the time is reserved for reading.

即使孩子们不情愿，他也会知道那个时间是为了阅读留出来的。

youdao

He is a reserved man with a handlebar moustache to rival any in this, the capital of handlebar moustaches.

BBC: The perfect trip: Southwest USA

He is also naturally reserved and has a calm, controlled manner.

WSJ: Changing the Sound of Your Voice

Olson's groping for a case to establish federal jurisdiction over the Florida election was a bit rich, since he is a leading member of the Federalist Society, the conservative group that is highly protective of the rights reserved to the states by the Constitution.

CNN: May It Please The Court