?? 詞語組成解析
acoustic
[?'ku:stik]
adj. 聽覺的;聲學的;原聲的;音響的;
??? 情景例句
Will you please try to relax?
能不能放輕松些?
On the desk.
在桌上。
What was the population of the less developed countries in 1950?
1950年不太發達國家的人口是多少?