Definition
To assume control or responsibility for someone or something, often with the intention of improving a situation or behavior.
（為了改善狀況或行為）負起責任，開始管理或處理
Since he took the project in hand, everything has become organized.
自從他接手這個項目後，一切都變得井井有條。
The manager of this department decided to take all the issues in hand personally.
這個部門的經理決定親自處理所有問題。
If we don't take these problems in hand soon, the situation will get worse.
如果我們不盡快處理這些問題，情況會變得更糟。