Technically, back labor occurs when the fetus is in a posterior position, with its face up and the back of its head pressing against your sacrum, or the back of your pelvis.
从技术上来说，背阵痛发生在胎儿处于背对的位置，它的脸朝上而后脑勺紧靠你的骶骨或者骨盆后方。
On the inhale expand the chest, lifting up and coming back to the starting position.
在吸气时扩展胸腔，举起回到开始体式。
Ensure that you have a back-end conversion goal set up and the right analytics in place so that you can track which AD position is actually resulting in the most conversions.
要设定转换率目标，并进行正确的分析，以便追踪哪个广告位置真正能产生最大的转换。
And a few less tasteful observations - and took up a deep position just in front of his back four.
他少了一些敏锐的观察力，仅仅只是占据四个后卫前方较深入的位置。
And if we do, in fact, hit it with light to get the electrons off, it will go back to the straight up in position, or if it gets knocked hard enough it does that, too.
而且如果我们这么做，事实上，用光轰击它以逐出电子，它就会在原位置沿直线返回，或者如果它被撞击的足够猛烈，也会出现上述现象。
I also trained Patou to pull me up in case I fell, and to stand still beside me as I attempted to rise from a seated position, holding her sturdy back for stability.
我还训练帕图在我跌倒时拉我起来，并在我试图从座位上站起来时静静地站在一旁，让我扶着她结实的背部保持身体平稳。
'Riding all the way up the hill, along the path, 'said Gabriel, thinking of her unladylike position on the horse's back.
“我看见你沿着这条路一路骑马上了山，”盖伯瑞尔说，想到了她骑在马上不雅观的姿势。
As a result, there is no need to get up, stretch oneself, go to fetch the rug or a pullover - as if by magic wand the back of the armchair will slightly change the position and get warmer.
结果，无需站立、伸展、取毯子或绒衣-好像借助于魔法棒，扶手椅的靠背就会微微改变位置并升温。
Many track coaches describe this ideal torso position as "running tall" and it means you need to stretch yourself up to your full height with your back comfortably straight.
许多田径教练将这一理想身姿描述为“跑得高挑”，意思是您跑步时需要将身体伸展至您的最大身高，背部舒服地挺直。
Allow yourself to dip down to the point where you just start to feel pressure inside your knee, and then come smoothly back up to the starting position.
允许在膝内开始感觉压力的点浸下来，然后平滑地向后回复到起点位置。
You get up from seated position on the quilt and begin walking back down the dirt path.
你从软毡上的位子上起身，开始顺着泥泞之路返回。
According to the protective speed curves, the tracking measuring function of infrared laser position transducer is applied for back-up protection of travel speed.
根据保护速度曲线用红外激光位置传感器的跟踪测量功能实现速度的后备保护。
I gave up my position, went back to work closer to home.
我放弃了当时的职位，回到离家近的地方工作。
If you express early on that you wish to be hired full-time, then your managers will have you in the back of their heads when a position opens up.
如果你很早就说想做全职，那么有职位空缺时经理会把你算在候选人里。
The fun 35-second clip shows the docile youngster occasionally looking up at the camera before bobbing back into his original position.
这个35秒钟的有趣视频里小男孩在西瓜中左右摇摆，间隙会不经意得看向摄影机。
"To this day, many people don't understand why I came back to China, " he said recently between a crush of visitors to his Tsinghua office. "Especially in my position, giving up all I had.
“直到今天，很多人还不理解我为什么回国，”最近，他在清华办公室接待川流不息的来访者时说，“尤其是处在我这样的位置，等于放弃拥有的一切。”
John Terry has gone on record to express his astonishment at how quickly his colleague began taking up the right positions as if centre back had been his position all his life.
特里已经公开得表示自己的惊讶，他的队友如此快的开始选择正确的位置就好像他在中后卫的位置上踢了一辈子。
When I picked up the car, there was a note that told me to just do nice things for people when I got into a better position in life and it would always come back to me.
我拿回车时，还收到了一张留了言的便条，让我在生活处于顺境时为人们做些好事，还说那会带来回报。
I gave up on the national side because you have to really work hard at Milan and I want to be in a position to play my best, but those trips back to Australia would've sapped me of too much energy.
我放弃国家队，是因为你会真的在米兰更努力的工作，我要在自己的位置上做得最好。但要从澳大利亚旅行回来后，那样会浪费我很多的精力的！
Drop-Knee :An exaggerated back-step where one knee is dropped toward the ground while the other is pointing up, resulting in a stable stemming position of the legs, especially on overhanging rock.
一只脚的膝盖朝下，另一只的朝上，使得双脚支撑得较好，尤其在悬岩的地方。
A dial on the back adjusts the width of the expandable seatback to fit a child's shoulders up to 20" wide. 11-position headrest adjusts up to 6.5" in height with one hand for an easy, precise fit.
背部座椅刻度盘调节展开式椅背至20英寸宽来满足孩子的肩部需要。11点定位头枕，可单手调节到6.5英寸的高度，轻松精确设置。
Magnetic stay plate can move back and forth to prevent ink from drying and coagulating. Printing pad can move up and down continuously to test position.
磁垫板可连续前后动作，防止油墨干涸凝结，胶头上下可以连续试位。
Magnetic stay plate can move back and forth to prevent ink from drying and coagulating. Printing pad can move up and down continuously to test position.
磁垫板可连续前后动作，防止油墨干涸凝结，胶头上下可以连续试位。
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