Keep the drill centred in the borehole while it ascends and descends.
当钻头上下钻时，要把钻孔保持在中心。
As evening descends on Dam Square so do the party-seekers.
当大坝广场的夜幕降临时，参加派对的人也来了。
Do bear in mind, though, that at this time of year the weather is very changeable and if the cloud suddenly descends, it's all too easy to wander off the track.
但是要记住，每年的这个时候天气变化无常，如果乌云突然降落，就很容易偏离轨道。
The curtain descends on the winter games.
冰上比赛落下帷幕。
A bird's-eye view of China would indicate that China's terrain descends in four steps from west to east.
从高空俯瞰中国大地，地势像四级阶梯，自西向东，逐级下降。
Outside, the drizzle descends.
外面已是蒙蒙细雨。
The silence descends in volcanic chutes.
寂静是乘着火山状的降落伞降临的。
The temporary weight descends, may invite more serious rebound.
暂时的体重下降，可能会招致更严重的反弹。
As Gretchen descends down the stairwell, Sucre attacks her.
格雷琴走下楼梯，苏克雷向她袭击。
Darkness descends on Perth, Australia, during Earth Hour 2008.
2008年地球一小时活动期间，澳大利亚的珀斯市陷入了黑暗之中。
Falling rain cools the air as it descends. This creates downward air currents.
降雨冷却了空气，这就向下产生了气流。
At night a vast yellow barrier descends on the crossing, trapping latecomers inside.
夜晚，一个巨大的黄色屏障徐徐下降，将晚归者拦腰在外。
In SSAX, by contrast, every node descends from a parent, passing and returning a seed.
与此相对比，在SSAX中，每个节点都来自一个父节点，传递并返回一个seed。
A canyoneer descends by rope through one of Kanangra Main Canyon’s three 150-foot waterfalls.
在卡南格拉主峡谷中，一位溪降探险者正从一个三段式的、每段都有150英尺高的瀑布上用绳子往下降。
Two polar bears SPAR in the snow as a magenta sunset descends over Churchill, Manitoba, Canada.
品红色的暮光降临到加拿大曼尼·托巴省的丘吉尔小镇，两只北极熊正在雪中打闹。
This page of readings on requirements acquisition descends from the comp.software-eng Usenet newsgroup.
这个有关需求获取的读物的页面源自comp.soft ware - eng Usenet新闻组。
The danger here is that Italy descends into the kind of vicious circle that other European nations have faced.
危险是，意大利会走进其他欧洲国家已经面临着的一种恶性循环中。
Regulate neurotic of after balance appear mess, the basic metabolism descends, the metabolism cans not develop smoothly, either.
调节神经的平衡出现紊乱后，基本代谢下降，新陈代谢也不能顺利开展。
This ratio also means that an unpowered hang-glider flying at a constant speed moves 15 metres forward for every one metre it descends.
这个比例也意味着一架无动力悬挂式滑翔机以恒定速率飞行时高度每下降1米，可以向前滑翔15米。
Strange, five months of toil and worry then calm descends as welcome and unexpected as an ice-cream van clattering through the bush.
说来也怪，五个月的困苦和忧虑过后，我渐渐平静下来，取而代之的是意想不到的愉悦，仿佛听见一辆冰激凌车正卡搭卡搭地穿过闷热的灌木丛。
Spencer Wells, a geneticist, laid out new research suggesting that all humanity descends from an African couple only 60,000 years ago.
一位名叫斯宾塞·韦尔斯(Spencer Wells)的遗传学家也详细阐述了他的一项新研究，该研究表明现有的所有非洲人都是6万年前一对非洲夫妇的后代。
The moment darkness descends, swarms of infested Terran refugees and Marines try to stagger into your base through the two chokepoints.
夜幕一旦降临，成群被感染的人类难民和陆战队员就会试图通过两个咽喉地带攻进你的老家，派陆战队员进驻地堡。
The water flows in ducts through concrete beams, and cool air descends upon the toiling masses from cold water radiators in the ceilings.
水在混凝土梁里面的管道流动，进入天花板的冷水散热器，冷空气从天花板的冷水散热器散发到上班人员的头上。
The py.test command descends into every directory and sub-directory in your project, whether a directory looks like a Python package or not.
test命令向下递归地搜索项目的每个目录和子目录，无论目录是否是Python 包。
This is why temperament descends easily into caricature: the feisty Give-'Em-Hell Harry, the cool-as-crystal Kennedy, the Vesuvian Lyndon Johnson.
这就是为何气质特征容易被漫画化：“地狱使者”杜鲁门，帅气的肯尼迪，“维苏威火山”林登约翰森。
And literally everything that you see, every computer, every mobile phone, every device, descends from the principles that were invented right here.
而且不夸张地讲，每一件发明，不管是电脑、手机，还是其他设备，其遵循的原理都诞生于此。
And literally everything that you see, every computer, every mobile phone, every device, descends from the principles that were invented right here.
而且不夸张地讲，每一件发明，不管是电脑、手机，还是其他设备，其遵循的原理都诞生于此。
应用推荐