一个哥伦比亚人想要别人靠近他时，他通常会用一个手势，一只手的所有手指都呈杯状，指向下方，同时快速地前后移动。
A Colombian who wants someone to approach him often signals with a hand movement in which all the fingers of one hand, cupped, point downward as they move rapidly back and forth.
汤姆小心地前后移动他的刷子，然后后退一步看。
Tom moved his brush carefully backwards and forwards and stepped back to look.
例如，在前古典时期的希腊，人们通过前后移动日期来“修正”官方日历，以反映季节的变化。
In pre-Classical Greece, for instance, people "corrected" official calendars by shifting dates forward or backward to reflect the change of season.
要练习前后移动幻灯片。
后续的调用会将迭代器前后移动指定的距离。
Subsequent invocations move the iterator backward or forward by the required distance.
盯着黑点，前后移动你的头试试！
在另一款游戏中，车子只能前后移动。
当合金流进连接处时，要前后移动火焰。
用滑鼠前后移动小人，画出其运动轨迹。
Move the little man back and forth with the mouse and plot his motion.
它前后移动着小腿，跑过马路和人行道。
It ran across roads and on pavements, moving its little legs back and forth.
在刷咬合面时，刷毛置于咬合面上前后移动。
At brush to bite to match, brush the hair to move after placing in bit to match come forward.
看着看点，前后移动你的头，你会发现什么？
Stare at the black dot, then move your head forward and back …what you will find?
这是因为它们的耳朵可以前后移动来捕捉声音。
This is because they move their ears forward and backward to catch sounds.
使用portlet底部的箭头在分页的表中前后移动。
Use the arrows at the bottom of the portlet to navigate through the paging table.
稀释后的血样可以通过反应室前后移动，直到血液凝结。
The diluted blood sample can be moved back and forth through the reaction Chambers until blood clots.
当声波进入耳蜗这条盘旋的管道，它令薄膜前后移动并且产生新的波动。
When sound waves enter the cochlea, which is really a tube coiled around, they set a membrane into a back and forth motion and cause a new wave.
将视线集中在中心的小黑点，然后前后移动你的头部，你发现了什么？
Focus on the dot in the center and move your head backwards and forwards.
其中一只手掌保持平放，缓慢的前后移动，就好像是屏幕上切换的图像。
One of the hands keeps a flat hand shape and it just kind of lightly moves back and forth as if it were a flickering image on a screen.
熨烫时要从背面前后移动着熨，这样可使作品更平整，不会伤到十字绣线。
Iron when ironing, should move to iron from rear from beginning to end, can make so work more level off, won't hurt cross-stitch line.
一旦刷完了内外两面，轻轻地使用旧式前后移动的方式来清洁牙齿的咀嚼面。
Once you've done all the sides, you can gently use that old back-and-forth motion to clean the top chewing surfaces of your teeth.
用你的手来给呼啦圈前后移动的力：呼啦圈会在你的手掌心和手背上交替着力。
Use your hand to power the hoop in a back-and-forth motion: the hoop will alternate between hitting the center of your palm and the back of your hand.
本实用新型既可以保证输送台的上下前后移动，又大大提高了传动的可靠性。
The utility model can guarantee the movement of all directions of the conveying table, and the reliability of the driving is improved greatly.
调整座可在机架两侧的滑槽上前后移动，调整座及机架后墙间有一组调整垫片。
Adjust seat available in sliding channel on either side of the frame and move on, adjust seat and the back wall frame to a group of adjustment between pads.
其他人则持续地在时间中前后移动，我们可能想起昨天和配偶的一次谈话，然后立刻跳到今晚的晚餐计划。
The rest of us constantly move back and forth in time; we might think of a conversation we had with our spouse yesterday and then immediately of our dinner plans for later tonight.
通过在两脚间轻轻地前后移动你的重心来实验，以便列清楚地感觉重心均匀地分配在两脚的那个点。
Experiment with shifting your weight back and forth slightly between each foot in order to feel more clearly the point where your weight is equally distributed between them.
要学会观察对手是左右移动慢还是前后移动更迟缓，并作出针对性的回球来利用好对手移动缓慢的弱点。
Always observe your opponents to see if they are slower moving to one side or the other. Or if they are slow at moving forward and back.
牙线紧紧地贴着牙齿，往上向远离牙龈的方向移动，再沿着牙齿邻面向下移动，把这个动作跟牙线的前后移动组合在一块。
Hold the floss tightly against the tooth, and move it away from the gum. Slide it firmly down the tooth surface, combining this with a back-and-forth motion.
牙线紧紧地贴着牙齿，往上向远离牙龈的方向移动，再沿着牙齿邻面向下移动，把这个动作跟牙线的前后移动组合在一块。
Hold the floss tightly against the tooth, and move it away from the gum. Slide it firmly down the tooth surface, combining this with a back-and-forth motion.
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