按照礼仪、规范或时尚所必需的；必备的。
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按照礼仪、规范或时尚所必需的；必备的。；社交礼节上需要的
Necessary according to etiquette, protocol or fashion.
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按照礼仪、规范或时尚所必需的；必备的。
Necessary according to etiquette, protocol or fashion.
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