unit 8
abstract
acronym 首字母缩略词
agitation
ancestor
arctic
astronomy
background
beacon 灯塔
blast
breakdown
burrow
capable
cease
chill
clip
commute
cone 圆锥体
constituent
coordinate
critical
daring
delta
dictate
disseminate
down 绒毛
ecology
emphasize
enzyme 酶
excavate
extinct
federal
flee
foster
furnish
geometric
graze
harmonious
hierarchy
hydrogen
impact
indispensable
innovation
interfere
ion 离子
kernel 核
layout
linear
lubrication
mandate
medicine
midair
modify
mundane
neglect
novelty
offspring
outbreak
painstaking
patron 赞助人
perishable
pile
plunge
potash 碳酸钾
prejudice
pull
radical
realism
recycle
reign
rental
residue 残渣
revise
rodent 啮齿动物
sail
scout 搜索
segregate
sharp
significance
smooth
spare
split
stake 赌注
stiff
strict
substitute 代替
supernatural
swift
tap
tenement
thorny 多刺的
tissue
traditionally
trend
tumble 摔倒
uniform
valid
vestige
volt 伏特
welfare
wreck
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