by tube

基本解释

She goes to work by tube .
她乘地铁上班。
Others try to recreate aparticular sound belonging to a piece of equipment that is old or nolonger current, such as the sound created by tube amplifiers。
还有些发烧友则想要重现一些老旧或者不再时兴的设备独特的声音，比如电子管功放发出的声响。
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But each strain is slightly different, and only the fastest growing one — determined by which tube turns the darkest green — will be chosen for further development.
但是每个品种略有差异，只有生长最快的那个——管子里颜色变得最绿——会被选择进一步开发。

He had a tube with electrodes potted in it filled with atomic hydrogen. And by applying a voltage, he was able to get the gas to glow.
那是个装满了氢原子并含有电极的管子,通过增加一个电压，他让气体燃烧起来了。
麻省理工公开课 - 固态化学导论课程节选
Pret and Starbucks are pretty much on every corner by every tube stop, aren't they? so.
普雷特和星巴克几乎出现在每一个转角，每一个地铁站，不是吗？所以，
知道普雷特公司吗？ - SpeakingMax英语口语达人
Here's a way that you can do it in a test tube without using any cells by this process called Polymerase Chain Reaction.
但有一个方法可以让你在试管中完成,不用细胞,这个方法叫聚合酶链式反应
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Metasonix is a little company run by vacuum tube guru Eric Barbour.
ENGADGET: Music Thing: The Metasonix Butt Probe