To fashion antennae for short-wave radio , for example , spouts between 18 and 24 metres high are about right .
例如,要制造短波无线电天线,18~24米高的水柱就够了。
One disadvantage of water spouts is that they can be torn apart by the wind .
喷水柱的缺点之一,是风会撕裂它。
And if a ship needed to be particularly stealthy ( which would mean keeping its transmissions to a minimum ) , her captain could simply switch the water spouts off altogether .
而假如一艘军舰必须格外悄无声息地行驶(意味着信号传播强度降至最低),舰长只要完全关闭喷水嘴就行了。
Not all of a ship 's antennae are used at once , so the spouts could be adjusted continuously to obtain the types needed at a given moment .