Difference between e-commerce and the TV is still very large, because electronic commerce is a means, how to use it is a skill, not with the remote control you can have.
电子商务和电视机的区别还是很大，因为电子商务是一个手段，怎么把它用好是一个技能，不是说用遥控器就可以了。
The time domain IP does not require very high relative precision of potential difference, but the supply current is large and the equipment is cumbersome.
时间城激电对电位差的相对精度要求不高，但供电电流大，装备笨重。变频法对电位差的相对精度提出了很高的要求，在极化率低时，难于达到。
The time domain IP does not require very high relative precision of potential difference, but the supply current is large and the equipment is cumbersome.
时间城激电对电位差的相对精度要求不高，但供电电流大，装备笨重。变频法对电位差的相对精度提出了很高的要求，在极化率低时，难于达到。
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