Avoucher
[古语、书面语]\\nvt. 担保, 保证, 对…负责：；宣布…为真实的；断言；肯定地说, 有根据地说；确证；主张：\\nvi. 做出保证(for)
🗣️ 情景例句
It works!
有效！
The contract will be sent to you by air mail for your signature.
合同会航邮给你们签字。
Where did you put it?
你把它放哪儿啦？