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

bill of interpleader

bipolar 8-zero substitution

boosting vaporizer

derived grammar

direct-reading analyzer

draft-quality printer

dry salt-pan phase

Goldman vaporizer

initial turning time

international telecomm charge card

intrinsic germanium detector

isopropyl-meta-chlorocarbanilate

joint attention

leucocytoclasia

locking control voltage

make a hash of it

marginal rate of tax

mutli-roll bridle

non-self-adjoint operator

nondecreasing sequence of function

Plato saccharometer

polybenzobisoxazoles

preventive effect

protective rate of BCG vaccination

remittance by check

replacement dynamics

retard position

sauris angulosa

self aeration mechanical agitation flotation machine

semiotic square

shift arrangement

shipboard computer

shunt excitation

spodogenous splenomegaly

ultramarathoner

uncleanlinesses

undesirable person