树懒速记
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高中>
BS高中2019>
选修1
选修1
Unit1-Topic Talk
Unit1-Lesson 1
Unit1-Lesson 2
Unit1-Lesson 3
Unit1-Writing Workshop
Unit1-Reading Club 1
Unit1-Reading Club 2
Unit2-Topic Talk
Unit2-Lesson 1
Unit2-Lesson 2
Unit2-Lesson 3
Unit2-Writing Workshop
Unit2-Reading Club 1
Unit2-Reading Club 2
Unit3-Topic Talk
Unit3-Lesson 1
Unit3-Lesson 2
Unit3-Lesson 3
Unit3-Writing Workshop
Unit3-Reading Club 1
Unit3-Reading Club 2
die out
消失;绝迹;灭绝
species
n.物种;种
wipe
vt.擦;拭
wipe out
彻底毁灭
unusual
adj.异常的;不平常的;不寻常的;
mass
adj.大量的
varied
adj.各种各样的;形形色色的
asteroid
n.小行星
decrease
vi.&vt.减少;n.减少;减少的量
blame
vt.责怪;指责;把…归咎于;