Colloidin
[医] 胶(体)变(性)质, 胶体素
🗣️ 情景例句
To help scrub the building interior clean.
帮忙把建筑的内部擦洗干 。
An idle youth,a needy age.
少壮不努力，老大徒伤悲。
as the wave leaves the particles behind back to its starting point again.
当波浪把微粒留在身后时又回到出发点。