Multigrade
a. (润滑油)多级通用的,多品位的,稠化的
🗣️ 情景例句
How much do I owe you?
我应付你多少钱？
How do you spend your leisure time?
你怎样打发业余时间？
Such an attempt only aggravates the strain of mental effort.
这种愿望只能加剧精神紧张。