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1·He was unsmiling and silent.

他十分严肃，一言不发。《柯林斯英汉双解大词典》

2·His eyes were hard and unsmiling.

他目光严厉冷峻。《牛津词典》

3·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。

4·In its first encounter, it might be somewhat honest and unsmiling that it came to know the user it would progress to a more relaxed and intimate style.

在初次接触时，它可能会有些正经和不苟言笑，随着它逐渐了解使用者，它会呈现出更加轻松、亲切的状态。

5·The boss is an unsmiling man.

老板是个不苟言笑的人。

6·We stared at each other, unsmiling.

我们都板着脸，看着对方。

7·She is a hot-tempered, stout, and unsmiling woman.

她是一位脾气暴躁、身材矮胖、不苟言笑的女人。

8·She was a big, unsmiling lady in a tight black dress.

这位夫人是个大块头、不苟言笑的人，身穿一件黑色紧身衣。

9·Voldemort inclined his head, unsmiling, and took another sip of wine.

伏地魔不带笑容地低下头，又呷了一口酒。

10·The unsmiling waiter gave me a blank look, so I strode off inside to search for it myself.

不苟言笑的侍者茫然地看了我一眼。

严肃的

1·He was unsmiling and silent.

他十分严肃，一言不发。《柯林斯英汉双解大词典》

2·What, the unsmiling waiter wanted to know, did I think I was doing, coming to his restaurant and opening the broom cupboard door. Stop it immediately.

那个一脸严肃的侍者不明白，我跑到他的餐馆来打开储物柜门要干什么，还是停止吧。

不苟言笑的

1·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。

2·The unsmiling waiter gave me a blank look, so I strode off inside to search for it myself.

不苟言笑的侍者茫然地看了我一眼。

3·Early pictures of Konosuke Matsushita show an unsmiling young man whose ears stick out like airplane wings.

在早期照片里，松下幸之助是一个不苟言笑，有一对机翼般招风耳的青年。

4·The boss is an unsmiling man.

老板是个不苟言笑的人。

5·She is a hot-tempered, stout, and unsmiling woman.

她是一位脾气暴躁、身材矮胖、不苟言笑的女人。