这是一个满是忧伤和严肃面孔的房间。

It was a room filled with sad, sober faces.

《柯林斯英汉双解大词典》

如果我是教练，我会告诉你，但是很严肃的说，能看到新面孔是很不错，因为每一个球队都会尝试增强实力。 每一个球队都会带进新鲜血液补充实力，希望我们也可以。

But seriously it is always nice to see new faces because every single team will try and strengthen.

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甚至在最严肃的人的面孔下，也藏着一颗好玩的心。

Even behind the most serious beings, hides a fun-loving spirit.

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