Underdevelop
v. (使)发展不完全, (使)显影不足
🗣️ 情景例句
you need to work at it, Grandpa.
你得常练它， 爷爷。
That's not the point.
这不是重点。
For them the working hours are never long enough.
对他们来说，工作时间总不会太长，