Underdevelops
v. （使）发展不完全, （使）显影不足（underdevelop的第三人称单数形式）
🗣️ 情景例句
I am, too.
我也一样。
It was not as good as I had expected.
那不如我想象的好。
We have an old musical instrument.
我家有件古乐器，