Costa Rica, 1986. 30 years after Doctor Cur's fateful African trip, graduate students from the University of Miami are on a field trip exploring caves. Moving ahead of the group, 24-year-old Inn-Saing Ooi climbs into a deep crevasse . He's not alone.

发表于:2018-12-05 / 阅读(38) / 评论(0) 分类 国家地理2007年

alkali碱 alloy结合体 aluminum铝 ajar半开的 bleach漂白 catalyst催化剂 compound化合物 crystal水晶 combustible易燃的 distill提炼 electrician电工 erase抹掉 flask烧瓶 fuse融合 hydrogen氢气 insulate隔热 intrinsic内在的

发表于:2018-12-30 / 阅读(58) / 评论(0) 分类 80天攻克雅思核心词汇

Now, its time for Words and Their Stories from VOA Learning English. Spring is in the air! Well, at least, in half of the world. The amount of daylight in the northern half is increasing, day by day. And air temperatures are slowly rising. Spring is

发表于:2019-01-03 / 阅读(58) / 评论(0) 分类 2018年VOA慢速英语(三)月

Some bees once built a fine honeycomb in a hollow tree-trunk.Now there are two kinds of bees in a hive:worker bees,who gather pollen and make honey all their lives,and drones,who lie lazily in the hive all day long doing nothing.It happen

发表于:2019-01-07 / 阅读(66) / 评论(0) 分类 趣味英语

上一次我们讲了三个带有bird这个词的习惯用语。它们是: bird brain。 Bird brain指没头脑、愚蠢的人和early bird special。 Early bird special是给早来顾客的特价优惠。还有strictly for the birds。 Strictly for

发表于:2019-01-08 / 阅读(66) / 评论(0) 分类 美国习惯用语

SCOTT SIMON, HOST: A swarm of potential stingers were unleashed on Washington, D.C., this week. This is not a political statement. A swarm of bees from one of the two hives atop NPR headquarters buzzed over the streets as they followed their queen ou

发表于:2019-02-13 / 阅读(31) / 评论(0) 分类 2017年NPR美国国家公共电台5月