Complex system
[计] 复杂系统\\n[经] 综合系统
🧩 词语组成解析
🗣️ 情景例句
why you have so many problems with math.
为什么你在数学方面有那么多问题。
I told him to stay overnight.
我告诉他留下来住一夜。
He was just falling asleep when there was a loud knock at the door.
他刚要入睡，就有人很响地敲门。