He took off his sweater and unbuttoned his shirt.
他脱去毛衣,解开衬衫的扣子。
...his unbuttoned blue coat.
他没有扣上纽扣的蓝色外套
Then she unbuttoned her navy-blue coat, and took out of the ball from the pocket.
然后她解开了海军蓝外衣的纽扣, 把球从口袋里掏了出来.
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