The customer might not follow the prescribed steps exactly when required.
客户可能不会在需要时完全按照规定的步骤进行。
Men have often been seen speeding up unnecessarily even when it is not required.
男司机们常喜欢踩油门，即使没有这个必要，或甚至不允许提速。
Cutting speed only in the surface roughness not required when it is not important.
切削速度只有在对表面粗糙度不做要求的时候才不重要。
A tape changer is not required when backing up to a hard disk.
在备份到硬盘时不需要磁带更换人。
You do not know when your soul will be required of you.
因为你不知道什么时候神要你的灵魂。
You do not know when your soul will be required of you.
因为你不知道什么时候神要你的灵魂。
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