易混淆的单词： Tubes

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Their many vacuum tubes and mechanical parts required constant maintenance .

其中有很多电子管和机械零件，需要经常维修。

Zettl embedded the tubes in an asymmetric pile of heavy molecules .

zettl把碳管嵌入了一堆不对称的重分子中。

Those cardboard tubes make terrific cable tidies !

这些纸板管制造出了了不起的线缆收齐器！

The transistor went on to replace bulky vacuum tubes and mechanical relays .

之后晶体管取代了笨重的真空电子管和机械继电器。

Being very small , transistors are widely used to replace vacuum tubes .

由于晶体管体积小，因此被广泛用来代替真空管。