Find something that makes a very quiet, steady sound. A small fan on a low setting or a real, non-electric, ticking watch or clock are ideal.
找一些安静、稳定的东西，一台低音的小风扇，一只电子手表或钟是一个很好的选择。
2
They settled on setting up a new electric power system.
他们决定建立一个新的电力系统。
3
Other options include using a hot pack an electric heat pad set on its lowest setting or a radiant heat lamp with a 250 watt reflector heat bulb to warm specific muscles and joints.