Centroid
n. 质心\\n[机] 瞬心线
🗣️ 情景例句
How's your English coming along?
你英语学得怎样了？
We've only sold our product at trade fairs, not in an on-going sales campaign.
我们的产品只在商展时展售，而没有办促销活动。
I don't think we'll be able to pay these price.
这种价钱我们恐怕没办法接受。