However a unilateral cervical mass that is firm and nontender should always raise the question of an undetected nasopharyngeal carcinoma.是什么意思_However a unilateral cervical mass that is firm and nontender should always raise the question of an undetected nasopharyngeal carcinoma.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句