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。
Did he walk forward or backward?
他向前走还是向后走？
Is the world we live in going forward or backward?
我们生活的这个世界是在进步还是在退步？
Motion may go forward or backward or even in circles.
运动可以向前，也可以退后，甚至可以兜圈子。
And now since it's reversible, we can run it forward or backward.
因为它是可逆的，所以可以正方向运行。
The Canon can be pushed forward or backward, and rotated 360 degrees.
佳能可以向前或向后推，和旋转360度。
Each word hides the name of a number written either forward or backward.
每个字组藏被写的数目的名字向前的或向后的。
"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。”
This will make the car lurch forward or backward which could be dangerous.
这种情况是非常危险的，将会使汽车前进或后退。
Come to a complete stop. Do not let your vehicle roll forward or backward.
首先要完全停车，车辆不能向前或前后滑动。
Like a real RC car, you must be going forward or backward to negotiate a turn.
就像真实的RC汽车，你必须向前或者向后才能进行转弯。
Buttons that you can click to move forward or backward through your presentation.
按钮，您可以点击向前或向后通过您的介绍。
Even the failure to do something is in itself a deed. It sets us forward or backward.
即使是失败本身，也是有所得的，失败可以催人奋进，也可以让人一蹶不振。
The positive or negative power flux means energy in waveguide travels forward or backward.
负的归一化功率流则说明了能量在波导中向后传输；
To get to other months you typically have to click forward or backward one month at a time.
为了得到你通常一次点击向前或向后一个月其他月份。
Quick Find can search through a document either forward or backward from the insertion point.
“快速查找”允许在一个或多个打开的文档的代码中搜索字符串或表达式。
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。
"Impossible thinking" and "may be thinking," like magic spells, pushes you forward or backward.
“不可能思维”和“可能思维”就像魔咒，推着你前进或后退。
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。
Then slowly he began to walk, not forward or backward, but in the same place, in the center of the log.
他开始慢慢走动，但并没有向前或向后，而是在圆木中间走动。
The consumption period (forward or backward) is specified in workdays and is valid from the current date.
消耗期间(向前或向后)指定从当前日期起的有效工作天数。
Some traverse forward or backward generated a lot of redundant data, resulting in greater price inquiries.
有的在向前或向后遍历时产生了大量的冗余数据，从而造成查询代价较大。
Researchers have found that light intensity can adjust the clock forward or backward by regulating the hormone melatonin.
研究人员发现，通过增强光亮调节褪黑激素可以将生物钟向前或向后调整。
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。
By turning a pair of composite eccentric bushings in the chassis and top deck, you can move the complete assembly forward or backward.
把一对复合偏心轴套在底盘和顶部甲板上，您可以提出完整的大会，向前或向后。
This function moves the file pointer from its current position to a new position, forward or backward, specified by the number of bytes.
整个函数将文件指针从当前位置向前或向后移动移动到一个新的位置。
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。
Whatever time forward or backward operation, most of the laws of physics can normal applications, but the second law of thermodynamics except.
无论时间向前或向后运行，大多数物理定律都能正常应用，但热力学第二定律除外。
The specific method is the belt roller group to which side, which side of the belt toward the direction of forward or backward on the other side.
具体方法是皮带偏向哪一侧，托辊组的哪一侧朝皮带前进方向前移，或另外一侧后移。
The specific method is the belt roller group to which side, which side of the belt toward the direction of forward or backward on the other side.
具体方法是皮带偏向哪一侧，托辊组的哪一侧朝皮带前进方向前移，或另外一侧后移。
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