When the ground on the piano, forward backward, met the ground level is not usual, don't too hard and avoid the piano body tilt, jean wheel broken or damaged.
在平地推钢琴时，前进后退，遇到地面高低不平时，不要用力过猛，避免对琴体倾斜，琴轮折断或部件损坏。
The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.
最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。
During a game, while sliding into third base, my cleat caught and pulled my foot to the right and backward as my body fell forward.
一次比赛，在进第三垒时，我的防滑钉被卡住了，身体朝前栽倒，脚腕却扭向右后方。
In pre-Classical Greece, for instance, people "corrected" official calendars by shifting dates forward or backward to reflect the change of season.
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。
On the first day of school, Socrates told his students, "Today, we'll only learn one thing. That is to swing your arm forward and backward."
在开学的第一天，苏格拉底告诉他的学生：“今天，我们只学一件事情。那就是前后摆动你的手臂。”
Shall we sway backward and forward, Mary, as if we were dervishes?
玛丽，我们要不要前后晃来晃去，就好像我们是托钵僧似的？
All chunks can be traversed starting from any known chunk in either a forward or backward direction.
所有的块都可以从任意已知块开始以向前或向后的方向被遍历。
Everything that we do is a step in one direction or another, even the failure to do something is in itself a deed. It sets us forward or backward.
我们做的每件事都是迈向一个或另外一个方向，甚至“什么都没做”本身也是一种行为，它让我们前进或倒退。
However, in some cases, you will need to read cursors both forward and backward, in which case you should use scrollable cursor.
但某些情况下，您需要游标既能向前又能向后，此时需要使用可滚动游标。
The way he was moving was not like a normal person would, it was like a glitching computer; he would "jump" forward, backward or to a side, then back to his normal place again.
他走的样子不像是个正常人，像个短路的电脑似的，他“跳著”向前、退后、或是向侧面走，然后又退回到之前站的位置。
Browse diagrams keep a history of the views it displays so that you can navigate forward and backward from each view.
浏览图可以保持它所显示视图的历史记录，因此您可以从任何一个视图向前或者向后导航。
The editing functionality means that you can go forward and backward through the command line currently displayed to make changes and correct typos.
编辑功能意味着您可以在当前显示的命令行中向前和向后移动，以做出更改或纠正输入错误。
As shown in the demo video (see Resources), these three-finger gestures are used to move forward and backward in the browsing history.
如演示视频所示(请参阅参考资料)，这些三指手势用于在浏览历史记录时向前和向后移动。
Plus, you can navigate forward and backward through a stack of generated Browse Diagrams (or navigate back to the home diagram), just as the name implies.
此外，您可以向前和向后导航被生成的浏览图的栈（或者导航回到主图），就如同名称中所暗示的那样。
"It gives you a point to work forward or backward from," Thompson explains.
汤普森解释道，“问清楚了，也好给自己一个时间定位，是向前还是向后。”
So again, for this slightly more complicated problem, the ratio of the forward and backward rates are related to the equilibrium constant.
又一次对于这个稍微复杂一点的问题，正向速率和逆向速率的比，和平衡常数相关。
Using buttons, you can move forward or backward in time, to go back to any date and time in the past and return to the current time.
通过按钮能够在时间上前移或后移，能够回到过去的任意时间点，并且能够回到当前的时间点。
Users can move forward or backward in time to see where the hurricane has been—and where it’s headed.
用户可以按时间顺序前后推移，以查看飓风曾经到过哪里，将要到哪里去。
Hummingbirds are well known for their wing speed and ability to hover and fly forward and backward with more precision than a helicopter.
众所周知，蜂鸟的翅膀拍打速度极快，它即可以凌空悬停，也可以快速向前飞行和向后飞行，其飞行的精准度甚至超过了直升机。
Naturally, the user can move forward and backward, and can even return to a favorite one by bookmarking it.
自然，用户可以来回切换，甚至能通过书签功能返回喜欢的图片。
It tugs at your hand, moving forward, backward, left and right to offer cues on direction and keep drivers from being distracted.
它拖船在你的手，前进，后退，左，右方向上提供线索，防止司机分心。
The navigation bar contains controls to navigate forward and backward as well as the ability to enter a page to load directly.
导航条包含了可以向前向后或者直接定位页面的控件。
You will also write navigation to help the user mover forward and backward through the image list.
还要编写导航，帮助用户在图像列表中来回移动。
Practice moving forward and backward through your slides.
要练习前后移动幻灯片。
Forward and Backward Movements.
前进以及后退。
Afterwards, I went toward the yard and looked upward, downward, inward, outward, forward and backward.
后来我走向院子，向上下内外前后看。
Forward and backward navigation through search results and marks.
通过搜索结果并标记来进行前向和后向导航。
Forward-loaded requirements, backward-loaded development.
前向-负载需求，后向-负载开发。
Forward-loaded requirements, backward-loaded development.
前向-负载需求，后向-负载开发。
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