with obj.
1
- twist or pull (something) sharply扭, 拧：
he tweaked the boy's ear.
他拧了男孩的耳朵。
2
- informal improve (a mechanism or system) by making fine adjustments to it〈非正式〉通过微调改进（机械, 系统）：
engineers tweak the car's operating systems during the race.
比赛期间, 机械师对这辆车的操作系统进行了改进。
1
- a sharp twist or pull扭, 拧。
2
- informal a fine adjustment to a mechanism or system〈非正式〉（对机械或系统所做的）微调。
词源
early 17th cent.: probably an alteration of dialect twick 'pull sharply'; related to TWITCH.