We often keep a straight face or use an unsmiling expression when we're making a joke.
当我们开玩笑的时候，我们经常绷着脸或使用不笑的表情。
His mother had always been a headstrong woman, and, with her grayish-white mane and unsmiling face, she appeared as regal and intimidating as she had ever been.
她母亲是一个意志坚强的女人，头发花白，不苟言笑，看起来比以前更加端庄而凛然不可侵犯。
In muscular early Victorian classical style, it was a monument to severe learning and a demonstration of the university's vast, unsmiling pride.
这座宏伟的早期维多利亚式的经典建筑，曾经是严谨治学的典范，也是牛津大学那一本正经、不拘言笑的骄傲的明证。
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