Echosounding
音响测深法
🗣️ 情景例句
He's the best pediatrician in Westchester.
他是全Westchester最好的小儿科医师。
Whom will you vote for?
你将投票给谁？
l am vacuuming the floor now and have several shirts to iron.
我正在用真空吸尘器清理地板，还有好几件衬衫要熨。