定约的英文：
fix

参考例句：

The declarer may easily lose his way on this contract before he has adjusted his sights
在这定约中，庄家在纠正他的看法以前，很容易迷失方向。

Have you finally decided to ask out that cute girl in your swimming class?
你终于决定约游泳课那位可爱姑娘出来？

To designate(a trump suit or no - trump)with the final bid of a hand in bridge.
最后定约叫牌打桥牌时通过一手牌的最后的定约叫牌指出(一组王牌或无王牌)

fix是什么意思：
v. 使固定；牢记；修理；安排；操纵；注视
n. 困境；贿赂

Have you fixed on the date?
日期选定了吗?

The horse race was a fix.
这场赛马有人操纵。

Can you get a fix on the submarine?
你能给潜水艇定位吗?

Please fix hotkey then:
请牢记您的“热键”目前是：

fixed pitch licence
固定摊位执照