Underdevelop
v. (使)發展不完全, (使)顯影不足
??? 情景例句
I'm sure the plan is viable.
我肯定這個方案行得通。
The doctor said I looked pale and tired.
醫生說我看起來蒼白和疲倦。
and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited,
所以只有在泥沙不停淤積的海洋和江河里，有時在湖泊里，