Scientific notation
[计] 科学记数法
🧩 词语组成解析
🗣️ 情景例句
He was very helpful to me, remember?
他帮过我大忙， 记得吗？
No. I have been away on vacation.
是呀，我休假去了。
The situation is serious. Something must be done before it's too late.
形势危急。得及时采取措施。