Sound barrier
音障
?? 牛津釋義
sound barrier
(also sonic barrier), point at which an aircraft's speed equals that of sound waves, causing sonic booms 聲障; 音障
break the sound barrier, ie move faster than the speed of sound 突破聲障（即以超聲速飛行）.
?? 詞語組成解析
sound
[sa?nd]
n. 聲音，聲響;音調，聲調;聲波;嘈雜聲;
vi. 響，發聲;聽起來，好像;回響;[音樂]樂器等被奏響;
vt. 使出聲，使發聲;清楚地發出;宣布，發表;頌揚;
adj. 健全的;合理的;完好的，無損的;明智的;
adv. 徹底地，充分地;
??? 情景例句
Pay more attention to the voice of youth.
多留意年輕人的意見。
Do not to others what you do not wish them to do to you.
己所不欲，勿施于人。
Yes. Could you ask him to call me, please?
可以。請你告訴他給我打個電話，好嗎？