If you had a motor here that was causing a paddle to move up and down you could cause waves to form at one end of the tank and move from left to right.
如果这里有一个马达，使桨上下移动，就可以在水槽的一端形成波浪，从左到右扩散。
2
As you move around the chamber, the volume of the sound goes way up and way down, depending on where you are in these standing waves.
当你在房间里移动的时候，声音的音量会上升或下降，这取决于你在这些驻波中的位置。
3
The waves were about five feet high now, and the bow of the boat was leaping up and down.