Faculative
a. 允许的, 任意的, 兼性的, 偶发的
🗣️ 情景例句
If you're under twenty-one years of age ...
如果你还不到二十一岁……
A good healthy body is worth more a crown in gold.
健康的身体贵于黄金铸成的皇冠。
I can't decide!
我拿不准！