Usas
[计]= United States of America Standard,美国国家标准
🗣️ 情景例句
I waited for you for about a quarter of an hour.
我等了你差不多一刻钟。
Without danger we cannot get beyond danger.
没有危险就不能解除危险。
The cave might never have been discovered has not the entrance been spotted by the distinguished French pot-holer, Berger.
若不是法国著名洞穴探险家伯杰由于偶然的机会发现了这个洞口的话，这个洞也许不会为人所知。