英语听力精选进阶版 13289

Earth¹ may house 8.7 million species

Vocabulary

devised

came up with a plan

reliable

accurate

intelligent guesses

estimates based on a rational process of thought

reckon

calculate

classification system

grouping of organisms following pre-established patterns

catalogued

identified and recorded

hastening extinctions

speeding up the disappearance of some species

wistfully

sadly

hitherto

up to now

vanish

disappear

1 earth   

n.陆地；大地；地球

参考例句：

• The earth moves round the sun.地球绕着太阳转。
• Spring returns to the earth.大地回春。