单词:traveling wave laser amplifier (twla)
行波式雷射放大器
单词:traveling wave laser amplifier (twla) 相关文章
By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca
发表于:2018-12-08 / 阅读(55) / 评论(0)
VOA常速英语2008年(四月)
2 What are the two speakers doing? [A] Walking down a hill [B] Climbing stairs [C] Discussing a trip
发表于:2018-12-30 / 阅读(60) / 评论(0)
听听测测
3 Where are the two speakers? [A] In a restaurant [B] On a farm [C] At the man's home
发表于:2018-12-30 / 阅读(58) / 评论(0)
听听测测
And the direction the crystals are pointing makes a difference to the speed seismic waves travel through the rock: a wave traveling parallel to the crystalsin other words, along the length of the toothpickmoves faster than a wave traveling in the oth
发表于:2019-02-15 / 阅读(34) / 评论(0)
英语时差8,16