Useful time
[计] 使用寿命, 有效时间
🧩 词语组成解析
time
[taɪm]
n. 时间;时刻;时代;次;
vt. 为…安排时间;测定…的时间;调准（机械的）速度;拨准（钟、表）的快慢;
vi. 合拍;和谐;打拍子;
adj. 定时的;定期的;[美国英语]分期（付款）的;
int. [体育]时间到，（一场或一局等的）比赛时限，暂停;
🗣️ 情景例句
There's saying, East and West, Cantonese Food is Best.
有句谚语说的是“食在广州”。
English has become an international language.
英语已经成为一门国际语言。
He looked very well though he was rather thirsty, for he drank half a bottle of milk.
它看上去一切正常，只是口渴得很，喝了半瓶牛奶。