Vfr
abbr. [航]目视飞行规则（visual flight rules）
🗣️ 情景例句
It's for babies.
这是给婴儿玩的。
You'll be sick, if you aren't careful.
你不小心的话，就会生病。
It is, in fact, a primitive type of calendar.
事实上是一种最原始的日历。