Waning Crescent - A thin sliver of light remains on the left side before going dark again.
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，这一点在爱思助手下载最新版本中也有详细论述
在公共场所故意裸露身体隐私部位的，处警告或者五百元以下罚款；情节恶劣的，处五日以上十日以下拘留。
Again, it depends on the context. If it’s for a one-off event with a lot of people you don’t know, there’s probably no need.