英语听力：探索发现

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英语听力：探索发现科学新发现：我们的大气层-24

This is a genuine iron meteorite, this is believed to have once been part of the core of a long dead planet or asteroid, and this was found right here in this strewn field, this remarkable little shapes, indentations on the surface are called thumbpr

发表于:2018-12-03 / 阅读(151) / 评论(0)

探索与发现2014年

英语听力：探索发现 2012-12-30 冰河新新州 Ice Age Oasis—8

But how did one man and a spear produce the huge force behind this blow? The answer lies with small bits of ivory like this. They were once part of an atlatl, or spear thrower. An atlatl acts as a sort of catapult, magnifying the strength of a hunter

发表于:2018-12-03 / 阅读(156) / 评论(0)

探索与发现2012年

英语听力：探索发现 2012-12-26 冰河新新州 Ice Age Oasis—6

These holes are the unmistakable hallmark of a violent death. Their shape suggest they were made by the teeth of a big cat, but which one? Today theres only one large cat in the region, the Florida panther. Though similar to the cougar at the western

发表于:2018-12-03 / 阅读(154) / 评论(0)

探索与发现2012年

英语听力：探索发现 2012-12-28 冰河新新州 Ice Age Oasis—7

But most significant of all, the jaguar has a tell-tale trademark. Instead of going for the neck or snout like most cats do, it kills with a crushing bite through the skull into the brain. This makes the jaguar prime suspect in this case. Even the gl

发表于:2018-12-03 / 阅读(141) / 评论(0)

探索与发现2012年

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学英语单词

antisymmetrical

audit in specific area

brucellergen skin test

carbon dioxide water mixer

civilized hygienic habit

coefficient of congruence

college of science

common carline thistles

consular marriage

domain name lookup

eitchen middens

electromagnetic hysteresis

eophyton sandstone

equivalent beds

exterior perspective center

gelatum aluminii hydroxidi siccum

Hoffmann's drops

hydraulic accumulator

inquiring (turn of ) mind

inservice inspection

integrated environmental control

keep vigil (over)

Lactuca undulata

leak-detection chamber

light bulky cargo

medulla spinalis

paraquat poisonings

phytostratigraphy

President Theodore Roosevelt

pseudo-scan bus

QAP (quality assurance program(me))

radial symmetry gradient

selvedge uncurler

servo system integral control

settlement-house

sex-influenced dominance

single rotor helicopter

transverse coastline

turnover station

unformulated surfactant solution

unsectioned half

variable-geometry inlet

variolaric acid

velocity attitude