题目内容
Informal attire has no necktie.
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Informal attire is considered a form of dress customarily appropriate for all formal settings that do not explicitly require white tie or black tie.
In the European tradition, casual dress emphasizes comfort and personal expression.
The exposure for men and women is the tendency both in formal dress and casual wear.
脂肪胺类化合物比芳香胺类化合物的亲核性要更强。
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