We hardly conceded a thing and the defence was practically perfect.
我们几乎没有失去什么，事实上防守很完美。
But practically, it's hard to get perfect effect using current automatic segmentation methods, and we have to add some interactive operations to get good segmentation effect.
在实际应用中的很多情况下，对图像采用现有的自动分割方法很难得到理想的效果，需要我们进行一些交互操作才能达到满意的分割效果。
Letters could be rewritten over and over again until they were practically perfect before being sent.
在寄出前，信是可以一遍又一遍地重写直到万无一失为止。
Letters could be rewritten over and over again until they were practically perfect before being sent.
在寄出前，信是可以一遍又一遍地重写直到万无一失为止。
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