What time is the same spelling backward and forward?
什么时候是相同的拼写向后和向前的？
What time is the same selling backward and forward?…
售前和售后什么时候是一样的?。
An owl's versatile toe can move backward and forward.
猫头鹰的脚趾能够前后自由转动。
Thus he could look backward and forward at the same time.
他一直可以向前看，也同时向后看。
After several goings backward and forward she was forced to bring him the key.
几番磨蹭之后她不得不拿给他那把钥匙。
Each phase informs the others, both forward and backward.
每个阶段都向其他阶段提供信息(既可以向前，也可以向后)。
By passing positive and negative increments, we will move forward and backward in the stack.
通过传递正或负的增量就可以在堆栈中向前或向后移动。
I stepped backward, and she stepped forward.
我后退了一步，她跟上来一步。
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 upper thighs can move forward, backward, and outwards.
在大腿能够迈步向前，向后和向外。
I keep across those procrastinator and slow, and make me forward into their backward.
我不断越过那些因循者与迟缓者，而使我的前进变成他们的落后。
Power control consists of forward link (downlink) power control and backward link (uplink) power control.
功率控制分前向链路（下行链路）、反向链路（上行链路）功率控制。
Youth looks forward and age backward.
青年人向前看，老年人回头看。
Youth looks forward and age backward.
译〕青年人向前看，老年人向后看。
Forward tilt is negative caster and backward tilt is positive caster.
连铸机倾斜向前为负，落后倾斜是积极的连铸机。
They can even have one eye looking forward and one eye looking backward !
它们甚至可以一只眼睛看前面，另一只眼睛朝后看。
Roll shoulders forward and backward.
轧辊的肩膀前进，后退。
This is because they move their ears forward and backward to catch sounds.
这是因为它们的耳朵可以前后移动来捕捉声音。
Roll head gently from side to side, then forward and backward.
柔和地向两边拉伸脖子，然后同样向前低头向后仰脖。
The car passed over the body twice, once backward and then forward .
那辆车把那人来回轧了两次，先是倒着轧的，再是往前开着轧的。
Youth looks forward and age backward.
青年展望未来，老年回忆过去。
Youth look forward and age backward.
青年人展望未来，老年人眷念过去。
Low and even forward (backward) and zero sequence impedance improves the quality of power supply.
电缆具有较低且均匀的正(逆)序和零序工作阻抗，有利于改善供电品质。
They drove forward and backward, moving 10 feet at a time, again and again.
他们一次又一次前进、后退，而车子每次只移动三公尺。
They drove forward and backward, moving 10 feet at a time, again and again.
他们一次又一次前进、后退，而车子每次只移动三公尺。
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