Subchain
[计] 子链, 子序列
🗣️ 情景例句
I'm sure they'll like it.
我相信他们会喜欢的。
I ask hin to tell me everything he saw.
我要求他告诉我，他所看到的每件事情。
The train was late but nobody knew the reason for the delay.
火车晚点了，但没人知道为什么。