Because the equipment for adding sound to films had not yet been developed.
因為給電影配音的設備還沒有研制出來。
高二英語課文
Unit 5 Charlie Chaplin
?? 句中詞匯解析
從本句中提取的重要詞匯
conj. 因為;
?? cause, cuse 表原因,目的;司法程序,訴訟
"He was arrested because of his political affiliation."
他因所屬政黨的關系而被捕。
近義：since, whereas, for, forasmuchas
n. 設備，裝備;器材，配件;（工作必需的）知識，素養;
?? equip配備，裝備+ment表名詞 →設備
"The new system will be compatible with existing equipment."
新的系統將與現有的設備相互兼容。
近義：instruments, mechanism, hardware, implements, luggage, materials
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;
"I can't bear the sound of chalk scraping on a blackboard."
我受不了粉筆在黑板上摩擦時發出的刺耳聲音.
近義：plumb, probe, study, fathom, holler, scream
反義：imperfect, blemished, defective, dud, faulty, flawed
a. 發達的（國家或地區）；成熟的
近義：matured, progressive, civil, civilised, civilized, advanced
反義：lagging, backward, undeveloped, unprogressive, backwards, developing