Cocatanic acid
[建] 柯卡丹宁酸
🧩 词语组成解析
🗣️ 情景例句
Hi. How was lunch?
嗨 。午餐怎么样？
It's a waste of time.
这是浪费时间。
My parents were visiting relatives, and my grandparents had decided to spend the day at home.
我父母走亲戚去了，祖父母打算那天在家呆着。