"一旦“的英语怎么说,两个词
问题描述：
"一旦“的英语怎么说,两个词
答
in case 万一，一旦
答
once
答
Once
答
once
Once you get into a bad habit, you'll find it hard to get out of it.
一旦染上坏习惯,想改掉就难了。
答
once
in a single day
in case
答
in case