Ion velocity
[机] 离子速度
🧩 词语组成解析
ion
['aiən]
n. <物>离子;
🗣️ 情景例句
I have to feed a family of five.
我不得不养活五口之家。
John had a rough time last night.
约翰昨晚好像挺轰轰烈烈的样子。
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。