the day of the week before Saturday and following Thursday
星期五
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he was arrested on Friday 他在星期五被捕
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the cleaning woman came on Fridays 清洁房间的女工每星期五来
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[as modifier]
Friday evening. 星期五晚上。
on Friday
在星期五
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we'll try again Friday. 我们周五将再试一次。
(
每星期五
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he goes there Fridays. 他每周五都去那里。
"Old English