他们很文静英语怎么说

"他们很文静" 的英文表达可以是 "They are very reserved."
"Reserved" 这个词的意思是保留的，拘谨的，不愿意分享的。这个词来源于拉丁语 "reservare"，意思是保留，留出。
下面是一些例句：
He was very reserved in his speech, giving short and concise answers to the questions. 他在演讲中很文静，对问题给出简短而简洁的回答。
She was reserved and shy, not wanting to draw attention to herself. 她很文静，害羞，不想引起自己的注意。
He was known to be reserved and thoughtful, taking time to consider his words before speaking. 他以文静和深思熟虑而闻名，在讲话之前花时间考虑他的话。