placed close together

栉栉───placed close together

Hertz's experiment sounds very simple. He used two pieces of metal placed close together. He used electricity to make a spark jump between the two pieces of metal.───赫兹的这项试验说起来非常简单，他用了两块金属板相互靠近地放置，用加电的方式使这两块金属板之间产生放电火花。

If placed too close together, antennae interfere with each other's signals. They also get in the way of aircraft and weapons.───天线若放得太近，信号就会互相干扰，而天线林立也会妨碍飞机跟武器。

This courier service could be most economically operated if both pollen and egg were placed close together on the plant.