Maildrop
na. 邮筒；邮筒槽口；秘密通信地址\\n
🗣️ 情景例句
we would like to have our investments returned as early and safely as possible.
我们总想尽早而又安全地收回我们的投资。
I meet the boy whose aunt is a housemaid.
我遇到那个男孩的姑妈是家庭主妇。
Yes, they do.
他们是。