vt.

1. 矯正；改正
   The tardiness in the investigation of the money laundering scandal is a situation that must be rectified immediately.

   查洗錢案的速度太慢是必須立即改正的狀況。

2. 【電】整（流）
3. 【化】精餾
4. 【數】求（曲線）的長度

v.

1. put right; correct.
2. convert (alternating current) to direct current.
3. Mathematics  find a straight line equal in length to (a curve).