Redar
红外光测距仪
🗣️ 情景例句
A large number of American radio stations operate in the red.
许多美国电台亏损经营。
Beggars must (should) be no choosers.
行乞的哪能挑肥拣瘦；饥不择食。
Mr. Smith knew Jack didn't look at the others because he was nervous.
史密斯先生知道杰克不敢看别人是因为紧张。