at a touch

• adv. 一接触(一碰)

例句

用作副词 (adv.)

1. When two lovers get in touch, it's like being electrified.
   两个相爱的人一接触就会有触电的感觉。
2. When you contact these two wires, the machine will start at once.
   当你使这两条导线一接触，这台机器就会立刻开始运转。