单词：oper-ating distance
单词：oper-ating distance 相关文章
In the 17th century, the French scientist Pierre Gassendi knew that light traveled faster than sound. When a gun fired far away, he could see the flash of gunshot long before he heard the report. Gassendi tried to measure the speed of sound by clocki
英语听力文摘 English Digest
NATO warships have launched an anti-piracy operation off the coast of Somalia by escorting one ship to port with plans for a similar operation on Tuesday. Lisa Bryant has more from Paris. The NATO operation aims to help calm the situation off Somali
VOA标准英语2008年（十月）
A single idea - the sudden flash of a thought - may be worth a million dollars. - Robert Collier Do you think it's possible to turn ideas into money? How? What good ideas have you heard about in recent years? What's the best idea you have ever had? C
english quotes 英文谚语
The Habitable Zone 宇宙生命奥秘 适居带(HZ)是天文学上给一种空间的名称，指的是那里的情况有利于生物的存在，或许可以发现像地球这样的生命体。有两种区域是有可能的，一个是在行星系内，
英语听力文摘 English Digest
Topics: The Mormon/LDS Church; school lunches; using in or on with body parts; fall off versus fall down; a dollar down and a dollar a week Words: denomination angel revelation polygamy mob to distance (oneself) from afterlife tithe missionary to go
美语听力 English Cafe
Parallax 视差就是从有一定距离的两个点上观察同一个目标所产生的方向差异。从目标看两个点之间的夹角，叫做这两个点的视差，两点之间的距离称作基线。只要知道视差角度和基线长度，就
英语听力文摘 English Digest