后退

Group 4, reaming and filing instrumentation with reamers and H files; group 5, filing instrumentation with K files only; group 6, the ultrasonic instrumentation.

研究分两部分：第一部分：将60颗离体牙随机分为6组，分别为空白对照组、扩大针组、扩与K型锉组、扩与H型锉组、K型锉组和超声扩锉组，采用逐步后退法预备根管。

Theintake stroke takes place by means of the piston spring when the exccentric moves back.

当偏心凸轮后退时，通过活塞弹簧完成吸入行程。

All that stuff is great. I think the '60s had some of the best melodies of all time between Peter, Paul, and Mary, and you know, all those people. The Mamas and the Papas were wonderful. And the Drifters go a little further back, but I love that song "On Broadway"--it's genius.

the Supremes的任何歌曲，所有的歌都很棒，我觉得60年代的歌曲拥有最好的旋律，都在 Peter， Paul，还有Mary这些人当中，你知道，所有的这些人，爸爸妈妈乐队是极好的， the Drifters走的有点后退，但是我很爱On Broadway，真是个天才的歌曲。

Sophie glanced at Langdon, uncertain whether she'd stepped back in time or into a nuthouse.

索菲疑惑地看着兰登，不知道自己是应该及时地向后退一步呢，还是停在原地。

By and by a proud-looking man about fifty-five -- and he was a heap the best dressed man in that town, too -- steps out of the store, and the crowd drops back on each side to let him come.

隔了一会儿，一个神气高傲、五十五岁左右的男子――他还是全镇衣着最讲究的人――从铺里走了出来，大伙儿从两旁纷纷后退，给他让道。

The objective standards of the EST risk assessment include pipe buried depth, frequency of going on a tour of inspection, amount of cars or trains to get by, thickness of the pipe or tank, occupied rate of the earth's surface on the pipe, depth of the corrosion pit, working time, soil resistively, MAOP, soil I〓, accident frequency, current velocity of river water, cutting down rate of the riverbed, fallback rate of the river bank, distance of the upper reservoir, criminal rate, attaining goal rate, reliability level, GDP, population amount, combustibility N〓, toxicity N〓, long-term danger RQ and so on.

专家评分法的客观性指标有管道埋深，巡线频率，日车辆通过数量，管道和罐的厚度，管道上方地面被占用率，腐蚀坑深度，服务年限，土壤电阻率，最大操作压力，土壤塑性指标I〓，事故频率，河水流速，河床下切率，河岸后退率，上游水库的距离，犯罪率，达标率，可靠度，国民生产总值，人口数量，易燃性N〓，毒性N〓，长期危险性RQ等。

There is a "back" button, press the menu will allow the re-emergence of the left column.

有一个&后退&的按钮，在按下时会再让左列选单重新出现。

Reaching the top of the staircase, Nahti led her prey into a well-furnished room.

她收回手臂，后退几步，一扫阴霾，提出了决斗的要求。

Long, well-muscled thigh; hind legs parallel when viewed from behind, hocks well let down, well-bent stifle.

后肢长，大腿肌肉发达；从后面看，两条后退平行，飞节向下，后膝角度适合。

Rare fine to the best remote control vehicle model, according to original vehicle 1 to 32 proportions fine, as slightly as a trademark, completely presses the original vehicle manufacture, the sparkling chrome-plating part, put in yours book shelf most appropriate only, the unique wristwatch infrared remote control operation, in the world the smallest remote control vehicle remote control, the ultra cruel wristwatch remote control, pressed on the wristwatch the button, could control this racing bicycle to the different direction advance, the backlash and the curve, but exchanged the ordinary vehicle mold chassis, turned an ordinary static vehicle mold, the replacement process extremely was also convenient, The entire screw organization, and has the tool oh, a vehicle actually has two uses ways, this it specialest place, the zinc base alloy +ABS engineering plastics material quality, the front of a train for the entire zinc base alloy metal manufacture, the front of a train and the oil pot might separate, the vehicle door may open, presses down on the wristwatch remote control the start key, the truck sends out immediately with the real vehicle same start thunders the sound, stopped when also had the braking sound, the ultra fine paint surface worked, the detail decided all perfect principles!

罕见的精细到极致的遥控车模型，按原车1比32比例精致，小到一个商标，全部按原车制作，闪闪发光的镀铬部件，放在您的书柜中最合适不过的了，独特的手表红外线遥控操纵，世界上最小的遥控车遥控器，超酷的手表遥控器，按动手表上的按钮，就能控制这台跑车向不同的方向前进、后退和转弯，而换上普通的车模底盘，就又变成了一部普通的静态车模了，更换的过程也极其方便，全螺丝机构，并配有工具哦，一部车却有两种使用方式，这就它最特别的地方了，锌合金+ABS工程塑料材质，车头为全锌合金金属制作，车头和油罐可分离，车门可开启，按下手表遥控器上的启动键，卡车立刻发出和真车一样的启动轰鸣声，停车时还有刹车声，超精致的漆面做工，细节决定一切的完美主义！

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了