很多情况下，调整操作一般都很顺利，然而，许多障碍都是粗心大意引起的，甚至对那些已经做了充分准备的人也不能避免。
In many cases, resizing operations can proceed smoothly; however, numerous stumbling blocks can cause problems for the unwary, or even for those who take adequate precautions.
操作失误纯粹归因于粗心大意。
The operating error was due to carelessness pure and simple.
本意指因粗心大意而造成操作失误。现被用为，故意做的，却说是失误造成的。
It originally means the misoperation due to carelessness and now is used to describe a person do something deliberately but argue that he has done it unintentionally.
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