By his somber expression I didn't know what to expect.
见他表情阴沉，我猜不出发生了什么事。
He widened his eyes in self-ridicule, then, the next moment, his expression became somber.
他瞪大眼自嘲道，一会儿，他的表情变得严肃起来。
One day before class, Megan's father asked to talk to me. By his somber expression I didn't know what to expect.
一天上课前，梅根的父亲找来说想跟我谈谈。见他表情阴沉，我猜不出发生了什么事。
He had a somber, expression on his face.
他脸上有郁的表情。
His expression was somber as he listened to the report of the accident.
根据他的脸部表情，你能够看出来他不是随便说说的。
His expression was somber as he listened to the report of the accident.
根据他的脸部表情，你能够看出来他不是随便说说的。
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