Unstuousness
油性, 润滑性
🗣️ 情景例句
As a matter of fact,
事实上，
Are you doing anything special?
你们有什么特别的安排吗？
Litter baskets have been placed under the trees, but people still throw their rubbish everywhere.
树下都已设置了废物筐，但是人们仍到处扔垃圾。