Tempus utile
[法] 盈利期间, 使用期间
🧩 词语组成解析
[医] 颞颥, 颞部
a. 有用的；有益的
🗣️ 情景例句
His wife has himi under her thumb.
他完全受他妻子控制。
Oh, no! I've missed my plane.
糟糕，我错过了我订的航班。
Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
如果有相配的电压，可以煮少量水的便携式热水装置是有用的。