英语听力精选进阶版 13289

（单词翻译）

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