1，复习
2,mat,
3,obstruct,block
4,overcharge,charge more money.
5,partly,some degree,not complete.
6,pollen,/ˈpɑː.lən,
powder produced by flower
7,predominant,
prime
8,prevalent,/ˈprev.əl.ənt/
existing very commonly.
9,protagonist,prime people
or
an important supporter for an idea
10,radiation
a form of energy from nuclear reaction
11,rehabilitate
make patient become commom.
12,renovate,
[ˈrenəveɪt],to repair ,improve something
13,sapphire,[ˈsæfaɪər]
a precious stone ,usually blue.
14,scatter,
move in all directions
15,sensual,
express sexually
16,shellfish
sea creatures live in shell
17,shuttle
travle between two places
18,sodium
salt chemical
19,spice flavour make you exciting.
20,stretch,to cause something to reach
21,strive,work hard
22,stylistic
relating aking of style of do something
23,surplus,more than needed
24,sweep,clean.
25,syllable,a unit of music.
26,temporary,not lasting.
27,tow,tow a car
28,unearth,to discover something in tht ground
29，varnish,liquid to protect surface
30,biological,about creatures