quantity: [14] Latin quantus meant ‘how much’ (it was a compound adjective formed from quī ‘who’). From it was derived the noun quantitās ‘extent, amount’, which passed into English via Old French quantite. Quantum [17], a noun use of the neuter form of the Latin adjective, originally denoted simply ‘amount’; its specific application to a ‘minimum amount of matter’ was introduced by Max Planck in 1900, and reinforced by Einstein in 1905. => quantum
quantity (n.)
early 14c., from Old French quantite, cantite (12c., Modern French quantité) and directly from Latin quantitatem (nominative quantitas) "relative greatness or extent," coined as a loan-translation of Greek posotes (from posos "how great? how much?") from Latin quantus "of what size? how much? how great? what amount?," correlative pronominal adjective, related to qui "who" (see who). Latin quantitatem also is the source of Italian quantita, Spanish cantidad, Danish and Swedish kvantitet, German quantitat.
实用例句
1. During fever a large quantity of fluid is lost in perspiration.
发烧时，大量水分会通过排汗而丧失。
来自柯林斯例句
2. In figure 24 "D" denotes quantity demanded and "S" denotes quantity supplied.
在图24中，D代表需求量而S代表供应量。
来自柯林斯例句
3. After some initial problems, acetone was successfully produced in quantity.
解决了最初的一些问题之后，终于成功地制造出了大量丙酮。
来自柯林斯例句
4. The sheer quantity of detail would bemuse even the most clear-headed author.
光是这么多的细节就会让哪怕是头脑最清醒的作者感到困惑。
来自柯林斯例句
5. In terms of quantity, production grew faster than ever before.