Ddu
abbr. 数字显示器（Digital Display Unit）；未完税交货（Deliverde Duty Unpaid）
🗣️ 情景例句
We started by making safety equipment for many sports.
我们是以做运动产品的安全器材起家的。
Take a pain for a pleasure all wise men can.
智者皆能视苦为乐。
You must keep it a secret. You mustn't tell anybody else.
你必须保密，谁都不能讲。