adj.沉思的;体贴的;缜密思考过的,深思熟虑的;
例句:
As grandfather got on in years, he became quiet and thoughtful.
祖父上了年纪后, 变得寡言、深思了.
Thank you. That's very thoughtful of you...
谢谢你,你想的真周到。
He looked thoughtful.
他一脸沉思的神情。