如果你希望朋友类别保留空白，请使用这个。
'none' - Use this if you want to leave the friendship category blank.
如果你希望将家庭类别保留为空白，请使用这个。
'none' - Use this if you want to leave the family category blank.
如果你希望将地理类别保留为空白，请使用这个。
'none' - Use this if you want to leave the geographical category blank.
即使一动不动，时间也在替我们移动。而日子的消逝，就是带走我们希望保留的幻想。类别：时间。
Even if motionless, the time also in moves for us. but day dissipation, is carries off us to hope retains fantasy. Category: Time.
提出一种基于类别信息的特征选择方法，该方法在尽量保留文档信息的同时，考虑了文档的类别信息。
A class information feature selection method is proposed, in which the class information of the training document is taken into account while keeping as much document information as possible.
若要保留此物件的参照，请在您实作方案事件处理常式的类别中宣告私用变数。
To retain a reference to this object, declare a private variable in the class in which you implement the solution event handlers.
这个类别代表一组依据记录顺序所建立的保留区域。
This class represents a set of reservation areas that are made in a record sequence.
通过测试类别，可以根据为各组测试分配的类别运行各组测试，无须保留测试列表。
Test categories let you run groups of tests based on their assigned categories without the requirement to maintain test lists.
保留事件资料的类别。
保留事件资料的类别。
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