光锥，锥形光束

VOA慢速英语2017--Distant Star Refuses to Die

Scientists have long believed that a star explodes when it reaches the end of its life. This explosion is called a supernova. NASA, the American space agency, describes a supernova as the largest explosion that takes place in space. Recently, a team

发表于:2018-12-12 / 阅读(111) / 评论(0)

2017年VOA慢速英语(十一)月

Strengthen Your Core With 5 Simple Exercises

Strengthen Your Core With 5 Simple Exercises From VOA Learning English, this is the Health and Lifestyle report. Your core is a complex network of muscles. It includes your abdominal muscles, back muscles and the muscles around you pelvis. Basically,

发表于:2019-01-12 / 阅读(63) / 评论(0)

2016年VOA慢速英语(七)月

2015-03-27 BBC:星光七纪元-20

Actually, Arcturus is an omen of something far worse than the bad weather, a portended drama more intense than any of what you could imagine. When our own sun eventually becomes a red giant in 5 billion years time, it will turn into a destroyer rathe

发表于:2019-01-23 / 阅读(47) / 评论(0)

探索与发现2015年

每日一词【417】hard-core：坚定的，铁杆的

今天我们要学的词是hard-core。 Hard-core, 是指坚定的，铁杆的。Hard-core gamers, 是指打电玩上瘾的人。Hard-core members of the party, 是指一个政党的中坚力量。All my friends are hard-core Redskin fans, 我的朋友

发表于:2019-02-05 / 阅读(56) / 评论(0)

英语每日一词

学个词Learn a Word 第417期 Hard-core

发表于:2019-02-08 / 阅读(90) / 评论(0)

英语单词荟萃

【英语时差8，16】地洞

Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye

发表于:2019-03-06 / 阅读(109) / 评论(0)

英语时差8，16

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学英语单词

A. L. I.

accelerating rocket engine

ADT (available device table)

artifactualizing

authenticated copy

bartes

BBM (break-before-make)