tweak

中文： 改进、调整、微调

1. A sharp pinch or jerk; a twist or twitch. · a tweak of the nose
2. A slight adjustment or modification. · He is running so many tweaks it is hard to remember how it looked originally.
3. Trouble; distress; tweag.
4. Methamphetamine. (slang)
5. A single inhalation of cocaine. (slang)
6. An additional input to a block cipher, used in conjunction with the key to select the permutation computed by the cipher.

复数 tweaks