Problem knowledge
[计] 问题知识
🧩 词语组成解析
🗣️ 情景例句
Birds are good pets, they can wake you up by singing in the morning.
鸟是很好的宠物，它们早上的歌声可以将你从梦中唤醒。
I must insist you finish what you have started!
我是说一旦开始的事就必须坚持到底！
While two detectives were keeping guard at the door, two others opened the parcel.
这时两个侦探把住门口，另外两个侦探打开了包裹。