Coboundary
[计] 上边缘
🗣️ 情景例句
He had a great capacity for learning.
他的学习能力很强。
What do you do at work?
你上班干些什么？
Ready? Go! Mr. Hu shouted, and the boys started to run.
“预备--跑！”胡先生喊道，男孩子们开始跑。