1,复习(有点尴尬。。这东西已经坚持了很长时间...)
1,tread,to put your foot on something and press.
2,thread,string。。你所不能区分的.
3,untapped,if something valuable is untapped, then it not be used or taken advantage..
4,atrophy, to reduce in size become weaker ,and have disease....（器官衰竭）
5，benign,kind and pleasant.
6,bog,wet,ground。。就说沼泽这个东西我也见过好多次了..
marsh,swamp
7,diffuse,to spread in all directions.
8,foment,to cause trouble and to develop it.
9,gild,to cover a surface with bright color...镀金?
10,innate, an innate ability is ability you borned with.
11,metropolis, a very big and important city.
12,pique, anger..
13,playwright,a person who write plays.
14,pulp,a soft ,mass.酱.
15,subliminal,the opinions in your deepest mind.
16,upheaval,n,a great change usually with arm or politics
17,bandanna,a scarf with mang color on it.
18,bison, 野牛..
19,camouflage,the use of leaf,plants,branches to hiding soliders equipment.
20,chlorine, a green-yellowish gas with strong smell.
21,crater,the hole on the top of colcano.or on the ground like this.
22,cubism,立体主义。
23，feeble,weak ,without energy.
24,indigestion, pain that you eat something that it is diffcult to digest.
25,;lethal, very dangerous ,maybe causing death.
26,membrane, a very thin transparent layer cover the cells.
27,nocturnal,being active at night.
28,pigment,color。。也可以叫色素.
29,rob on the sea.
30,pivotal,important and core.