V-T If you tweak something, especially part of someone's body, you hold it between your finger and thumb and twist it or pull it. 扭; 扯
He tweaked Guy's ear roughly.
他粗暴地扯盖伊的耳朵。
V-T If you tweak something such as a system or a design, you improve it by making a slight change. 稍稍改进(如系统或设计) [非正式]
He expects the system to get even better as the engineers tweak its performance.
他期望在工程师对该系统的性能稍加改进后，它会运行得更为良好。
N-COUNT Tweak is also a noun. 稍稍改进
The camera has undergone only two minor tweaks since its introduction.
这款相机自推出以来只经过两次小的改进。
The focus is on individuals, tweaking performances to squeeze an extra hundredth of a second here, an extra millimetre there.
工作的重心放在个人上，通过调整他们的各种表现，努力在这次比赛中多缩短百分之一秒，在那场比赛中多出一毫米。
Once you're finished tweaking, reboot the machine.
一旦您完成调整，重新引导机器。
When it's off target or needs tweaking or even an overhaul?
当目标已经偏离或需要小改，甚至大修？
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