Validator
n. 验证器
🗣️ 情景例句
What about your arms? Lift your arms up like this.
你胳膊怎么样?手抬起来， 像这样。
It's easy to fall into a trap, but hard to get out again.
堕入陷阱易，脱离陷阱难。
Certainly. This way, please.
当然可以。这边走。