Maildrop
na. 邮筒；邮筒槽口；秘密通信地址\\n
🗣️ 情景例句
This method should be widely promoted.
这种方法应该推广。
We know that you are leading exporters of coal and you can provide the quantity we need.
我们知道贵方是主要煤炭出口商，能满足我们的需求量。
however painful it may be at the moment.
尽管会有暂时的痛苦。