安全帽;(飞行员, 摩托车驾驶员等的)防撞头盔
词型变化:名词复数形式 : crash-helmets

[0:0]virtue virus vision vital美德,德行 病毒 幻想,视觉 极其重要的 [0:35.0967]vivid volcano voltage voluntary生动的,鲜艳的 火山 电压 自愿的,志愿的 [1:17.2033]volunteer vote wage wagon志愿者 票,选票 工资,报酬 四轮马车,大篷车 [1:57.9174]wander w

发表于:2018-12-05 / 阅读(111) / 评论(0) 分类 闭着眼睛飘单词 四级词汇

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Why do some chords sound sweet but others make you wince? Well it appears our earsor at least the ears of 250 Minnesota undergradsprefer chords containing harm

发表于:2018-12-24 / 阅读(71) / 评论(0) 分类 Scientific American(五)月

Students who listened to different chords rated as more pleasing the ones that westerners think of as harmonious, the individual notes of which have definite mathematical relationships 【英文文本】 Why do some chords sound sweet but others make

发表于:2019-01-02 / 阅读(54) / 评论(0) 分类 60秒科学

China has long depended on coal-burning power plants to fuel its explosive growth over the past three decades. As a result, air pollution has risen to alarming levels in central and eastern regions. Policymakers have been working hard to shift the co

发表于:2019-01-19 / 阅读(102) / 评论(0) 分类 2017CRI中国国际广播电台

Vocalist Catherine Russell is always searching for that next great melody. She's found more than a dozen of them to sing on her latest album, Inside This Heart Of Mine. Catherine Russell is a perfectionist when it comes to choosing her material. Her

发表于:2019-02-06 / 阅读(54) / 评论(0) 分类 VOA标准英语2010年(六)月

vacant a.空的;未被占用的 vain a.徒劳的;自负的 valid a.有效的;正当的 vapour n.汽,蒸气 variable a.易变的 n.变量 variety n.多样化;种类;变种 various a.各种各样

发表于:2019-02-19 / 阅读(150) / 评论(0) 分类 英文语法词汇