Sustained sound
[電] 持續聲
?? 詞語組成解析
sustained
[s?s'teind]
adj. 持久的，持續的;
v. 維持( sustain的過去式和過去分詞 );支撐;忍受;長期保持;
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
Nope.
不會。
Do you have any idea on this subject?
對于這個題目你有什么看法？
Among these I would list string and brown paper, kept by thrifty people when a parcel has been opened, to save buying these two requisites.
這些東西中我想舉出線繩和包裝紙為例。節儉的人們打開包裹后便把這兩樣必備的東西收藏起來。省得日后去買。