n.

1. 扭；捏；拧
2. 苦恼，焦急

vt.

1. 扭；捏；拧
   You have to use a lot of force to tweak and open this bottle of beverage.

   你必须用很大的力气才能将这瓶汽水打开。

2. 稍作修改；稍作调整
   This report only needs to be tweaked a bit. Most of it is OK.

   这份报告只需稍作修改，大部份是 OK 的。

v.

1. twist or pull with a small sharp movement.
2. informal improve by making fine adjustments.

n.

1. an act of tweaking.
2. informal a fine adjustment.