controlled by movement or sound, rather than by a keyboard, button or other device that you need to touch

They introduced touchless water taps and flushes. 他们推出了非接触式水龙头和冲水器。

These cameras are gesture-controlled or "touchless". 这些照相机是由手势控制的，或者说是 "非接触式"的。

using a process where one object does not touch another, or where something is touched only by water

The touchless car wash uses water jets and detergent, but no brushes, minimizing damage to the vehicle. 非接触式洗车机使用喷水器和洗涤剂，但不使用刷子，以减少对车辆的损害。