Undersetting
v. 底流, 暗流, 与海面流向相反的潜流( underset的现在分词 )
🗣️ 情景例句
Bye, Dad.
再见， 爸爸。
The contract will be sent to you by air mail for your signature.
合同会航邮给你们签字。
He was born in New York.
他出生在纽约。