"a mere formality"
"the formality of his voice made the others pay him close attention"
"courtroom formality"
《牛津词典》
《柯林斯英汉双解大词典》
《新英汉大辞典》
《柯林斯英汉双解大词典》
《牛津词典》
《牛津词典》
《牛津词典》
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