A sonic boom is the loud crash and shaking that happens when a jet plane goes faster than the speed of sound 声爆是当喷气式飞机超音速行驶时产生的巨大碰撞和摇动声。
Compared with jet planes and propeller - driven aircrafts , the radar echoes of helicopters have different characteristics 与喷气式飞机和螺旋桨飞机相比，直升机的雷达回波具有不同的特点。
A very powerful jet plane is needed to take you into the stratosphere , but you need a space ship / mental body , to travel through space 将你带至同温层需要一架马力强劲的飞机，但要到太空去遨游，你就必须有一架航天飞机或心灵躯体。
A jet plane crosses the continental united states in about five hours , but a traveler in an express train needs more than forty - eight hours to cross the country 一加喷气式飞机穿越美国大陆要5个小时，但是旅客坐快速列车就需要48个多小时才能穿越美国。
The people in our neighborhood are sending a round robin to the air force to protest the nice the jet planes make flying over our house 我们这一带的居民在向空军部队递交一份有环形签名的抗议书，就喷气式飞机飞越我们住宅上空时产生的噪音问题提出抗议。
Inorfil flame retardant coating for jet plane , zinc silicate primer , high temperature resistant coating , anticorrosion painting of epoxy asphalt glass squama , top - grade interior and exterior wall coating , ultralow surface treatment coating , industrial terrace coating , ethyl silicate 硅酸锌涂料、耐高温涂料、环氧沥青玻璃鳞片防腐涂料、高档内外墙涂料、超低表面处理涂料、工业地坪涂料、硅酸乙酯
Freezing efficiency of f atom in oxidant nozzle of different contour walls , mixing mechanism of reactants in 2slot ( two - dimensional , plane symmetry nozzle ) nozzle and comparison of flow - fields & ssg between 2slot and 3slot ( 3 - slit jet plane nozzle ) have been studied by using 2d cr program . the conclusion is significant to understand the requirement of reactant flows and to generate ideas for nozzles design 利用二维r程序，研究了单喷管型面对f原子冻结效率等参数的影响：研究了二维平面对称喷管（ 2slo ）的反应流混合机制和混合角对激光器性能的影响；对比研究了zslot和三狭缝平面对称喷管oslot ）流场和增益特征。
To learn about the characteristics of the radar target data is a prerequisite to ratr . so this dissertation process a lot of measured and simulated data , and make a detailed analysis on the characteristics of the radar echoes from jet planes , propeller - driven aircrafts and helicopters . the results can be used in ratr and lay the foundations for the future research 进行目标识别必须对获得的目标数据特性有充分的了解，本文正是在这样的研究背景下，使用大量的实测和仿真数据，详细分析了喷气式、螺旋桨和直升机三类飞机目标的雷达回波特性，得到了一系列对目标识别有用的结果，为进一步的目标识别工作打下基础。
These include activities such as the establishment of a network for countermeasures for emerging infectious diseases and promotion for the development of a small and medium - sized jet plane conducted through the asian network of major cities , which has demonstrated the efficacy of inter - city collaborations across national borders , as well as our domestic implementation of policies that include the establishment of a regional crisis management system through development of our version of the us federal emergency management agency fema in the greater tokyo area comprising the eight metropolitan , prefectural , and municipal authorities 东京都政府正在积极制定全国性的政策。这些措施包括：建立一个应对传染性病毒爆发的网络开发涵盖亚洲各大城市间的小中型喷气式客机，这将证明在跨国境的城市间合作具有很好的效能，还有就是一些国内政策的执行，其中有：在包括8个都县市政府在内的首都圈，开发日本版的fema ，建立一个区域应急管理系统。
It s not only the keyboards of the geronimo team , but the keyboards of the wadi team developers that are smoking these days . somewhere , drowned out by all of the keyboard noise , is the sound of jet planes , all flying out to san diego , california , for apachecon us 2005 , where the canvas will be torn off of geronimo revealing the bright leds of the flashing 1 . 0 sign 不仅是geronimo团队的键盘，而且wadi团队开发人员的键盘这些日子也都被敲得冒烟。所有这些键盘的声音淹没了喷气式客机的声音，这些飞机飞往加州圣迭戈参加美国apache 2005大会，在会上geronimo的幕布打开时，闪烁的led会显示1 . 0的标志。
