mass of 和 amount of 和 many of他们的区别和用法

a mass of 一大堆，一大团，里面的数不可数
- a mass of mud, 一堆泥土
amount of 不可数 number of 可数
what's the amount of sand ...? 多少沙
what's the number of students .. ? 多少个学生
many of 大多数 - 可数，most of 不可数

mass of:
π-meson π介子的质量
Examples:
1.I found a mass of spawn in the fish before cooking.
烧鱼前,我发现鱼里有很多鱼籽.
2.A cloud is a mass of vapor in the sky.
云是天空中的水汽团.
3.A cloud is a mass of vapour in the sky.
云是天空中的水汽团.
4.A great mass of rock had fallen from the cliff and now blocked the road.
一大堆岩石从悬崖上掉了下来,堵塞了道路.
5.There is a heterogeneous mass of papers in the teacher's office.
老师的办公室里堆满了大批不同的论文.
6.The garden was a mass of colour.
花园中五彩缤纷.
7.The flowers made a mass of colour against the stone wall.
以石墙衬托著的花朵五彩缤纷.
8.A dense mass of black hair framed his face.
浓密的黑发衬托著他的面庞.
amount of 大量许多的
eg:he has any amount of money他有许多钱
no amount of lies can cover it up再多的欢颜也掩盖不了这一点
many of大多数
eg:many of them can speak english in fluent
他们中的大多数都能流利地说英文