Tribological
a. 摩擦学的
🗣️ 情景例句
Take it easy. Don't work too hard.
悠着点。不要操劳过度。
How much is this rug?
这条地毯多少钱？
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。