tit-for-tat

n.

针锋相对；

1. Retributive justice demands an eye for an eye.
   报复型正义要求以眼还眼，以牙还牙。
2. He was comforted by the thought that he had given Mrs Green a Roland for her Oliver.
   一想到已经用以牙还牙的方式对待了格林太太，他就感到宽慰。
3. I would pay him back for his treacheries.
   对他的背信弃义我要报复。
4. He was waiting for an opportunity to retaliate.
   他在伺机报复。

Tit-for-Tat
A strategy of win-stay, lose-shift that outperforms tit-for-tat in the Prisoner's Dilemma game.
Tit-for-tat: Type VI secretion system counterattack during bacterial cell-cell interactions
Locomotion in social dilemmas: How people adapt to cooperative, tit-for-tat, and noncooperative partners.
Tit-for-Tat: Type VI Secretion System Counterattack during Bacterial Cell-Cell Interactions.(Report)
Direct reciprocity with costly punishment: generous tit-for-tat prevails
Human Cooperation in the Simultaneous and the Alternating Prisoner's Dilemma: Pavlov Versus Generous Tit-For-Tat
Simultaneous hermaphroditism, tit-for-tat, and the evolutionary stability of social systems ☆
Robust incentives via multi-level Tit-for-Tat: Research Articles
Tit-for-tat: the neural basis of reactive aggression