travel vi. (〔英国〕 -ll-) 1.旅行〔尤指到外国或远地〕。 2.到外地推销。 3.(火车等)行驶;行进;(声、光)传播;(机件等)走动,移动;依次看去,依次想去。 4.与…交往[常在一起]。 5.(牲口)一面吃草一面向前走;〔美口〕飞快地走,飞跑;【篮球】带球走。 vt. 旅行;赶(畜群等),使移动。 travel second [third] class 乘软[硬]席车旅行。 travel for a firm 代表商行到外地去推销[出差]。 Light travels faster than sound. 光比声音传播得快。 We have travelled far from those days. 从那时候到现在已经过了很多日子。 The car is travelling. 汽车飞快地跑着。 Her mind travelled over recent events. 她反复想着最近发生的事情。 Keep travelling! 〔美口〕去! travel along 〔口语〕(快步)走! travel it 步行,(徒步)旅行。 travel on steel runners 乘雪橇旅行。 travel out of the record 谈到题外(枝节问题)。 travel through the air 乘飞机旅行。 n. 1.〔常 pl.〕 (特指远程的)旅行;旅行记,游记。 2.往来,交通。 3.【机械工程】行程,动程,冲程;(彗星、光、音等的)进行,移动,传播。 space travels 太空飞行[航行]。 go on a travel 旅行。 travel of valve 【机械工程】阀行程。 travels in the blue 沉思冥想。
In a uniform medium light travels in straight lines . 在均匀介质中光沿直线传播。
Light travels faster than sound . 光比声音传播得快。
Light travels faster than sound . 光比声音速度快。
Early in life we learn that light travels in straight lines . 早先在生活中我们就知道光是直线传播的。
The light travels in a composite medium made up of the film, the substrate and the cladding . 光在由薄膜,衬底和覆盖层组成的混合介质中传输。
A light-year is the distance light travels in one year at a speed of 299, 792 kilometers per second . 一光年是光以每秒299792公里的速度在一年中所走过的距离。
Our physical picture of guided light propagation is that of light traveling in zigzag fashion through the film . 导波光的传播的物理图象就是光按Z字形方式通过薄膜传输。
Light and shade come in swift alternation ; days and months flash by as quickly as a weaver 's shuttle. ; light travels like an arrow , and time like a shuttle . 日月如梭。
He said that light travels much faster than sound 他说光传播比声音传播快得多。
Light travels at a speed of 300 , 000 km per second 光以每秒30万千米的速度传播。