Obss
abbr. ocean bottom scanning sonar 海底扫描声呐
🗣️ 情景例句
Thank you. I'll make out the contract for you to sign tomorrow.
谢谢。我将起草合同，明天就签。
It's up to us to help those in need.
我们有责任帮助那些有困难的人。
Where're Lucy's pencils? Are they on her desk?
露茜的铅笔哪去了？在她的桌子上吗？