词源:
quant 数量 + ity 构成名词，表示性质 -> 数量 -> quantity 数量
n. 量，数量；大量；总量
Is it available in sufficient quantity?
这东西能不能足量供应？
Prices vary according to the quantity ordered.
价格根据所订数量而变化。
I just can't even conceive of that quantity of money.
我简直无法想像那样一笔数量的钱。
The case contained a large quantity of U.S. dollar bills.
盒子里装有大量美钞。
单词记忆就是词根quantit+词缀ative，中文意思是adj.
定量性的;量化的;数量的;
例句
However, due to the complexity of tribological system, it is definitely difficult to gain accurate quantitative wear laws to monitor/ predict wear status or provide a guide for tribological design.
Quant是一个职位，是指量化交易员。Quant是一个复杂的职位，需要具备良好的量化分析能力、编程能力和风险管理能力，负责分析市场数据，利用量化技术进行交易，并对交易风险进行管理。