Because the equipment for adding sound to films had not yet been developed.
因为给电影配音的设备还没有研制出来。
高二英语课文
Unit 5 Charlie Chaplin
📚 句中词汇解析
从本句中提取的重要词汇
conj. 因为;
💡 cause, cuse 表原因,目的;司法程序,诉讼
"He was arrested because of his political affiliation."
他因所属政党的关系而被捕。
近义：since, whereas, for, forasmuchas
n. 设备，装备;器材，配件;（工作必需的）知识，素养;
💡 equip配备，装备+ment表名词 →设备
"The new system will be compatible with existing equipment."
新的系统将与现有的设备相互兼容。
近义：instruments, mechanism, hardware, implements, luggage, materials
n. 声音，声响;音调，声调;声波;嘈杂声;
vi. 响，发声;听起来，好像;回响;[音乐]乐器等被奏响;
vt. 使出声，使发声;清楚地发出;宣布，发表;颂扬;
adj. 健全的;合理的;完好的，无损的;明智的;
adv. 彻底地，充分地;
"I can't bear the sound of chalk scraping on a blackboard."
我受不了粉笔在黑板上摩擦时发出的刺耳声音.
近义：plumb, probe, study, fathom, holler, scream
反义：imperfect, blemished, defective, dud, faulty, flawed
a. 发达的（国家或地区）；成熟的
近义：matured, progressive, civil, civilised, civilized, advanced
反义：lagging, backward, undeveloped, unprogressive, backwards, developing