一、20个英文单词
1，banquet
n.(正式的)宴会，盛宴；adj.宴会的
The banquet had many different kinds of food.
2，substantial
adj.重大的，本质的，实质的，牢固的，大量的，价值巨大的；n.本质，重要部分
They collated a substaintial amount of donated materials.
3，tax
n.税，税款，负担，重负；v.征税，使负重担，斥责
The amount of tax people pay to the government depends on their income.
4，facet
n.(多面体的)面，小平面，琢面，侧面，部分，方面；vt.在...上面
This diamond has many facets.
5，vinegar
n.醋；v.加粗于
Shanxi Province is famous for its vinegar.
6，crucial
adj.关键的，至关重要的，决定性的
This crucial round will decide who will win the game.
7，incredible
adj.惊人的，不可思议的，难以置信的，不可相信的，极好的，极大的
She gives an incredible expression.
8，distant
adj.遥远的，远方的，疏远的，心不在焉的，不亲近的，久远的
The destination is still distant.
9，shell
n.壳，外壳，骨架，贝壳，炮弹；v.剥壳，炮击
The egg shell broke in half.
10，intense
adj.强烈的，激烈的，紧张的，认真的，热情的，热切的，极度的
People are having an intense training in the gym.
11，mass
n.大量，一堆，大多数，群众，团，块，堆；v.聚集；adj.大量的，广泛的
A mass of people are waiting.
12，chamber
n.会议室，房间，议院
The council chamber has enough seats for a meeting.
13，charter
n.宪章，特权，豁免权，契约，证书，租赁，营业执照，共同纲领，凭照；v.包，租；adj.包租的，租用的
The American Constitution is a charter that outlines a system of government.
14，frost
n.霜冻，严寒，霜；v.撒上糖霜，结霜
The leaves were covered with frost.
15，rear
adj.背面的；n.后部；v.抚养，举起
I could see the trees along the way in my rear-view mirror.
16，ignore
vt.忽略，忽视，不理睬
The boy's family ignored him as they were doing their own things.
17，headmaster
n.男校长
The headmaster is awarding diplomas.
18，rough
adj.粗糙的，大致的，粗略的，困难的，令人不快的，粗暴的；n.草稿；adv.粗暴的；v.艰苦生活
The hands for the farmer are rough.
19，beware
v.当心，谨防
Passers-by are warned to beware of the bear.
20，inevitable
adj.不可避免的，必然的；n.必然发生的事
It is inevitable for people to get old.
二、指数与对数
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