We've specified some parameters to the Label and Button widgets and then called pack, one of Perl/Tk's geometry managers, on each of them.
我们为标签和按钮部件指定一些参数，然后调用pack ，该语句是Perl/Tk 的几何管理器之一。
COM needs just a little bit of help to perform all these miracles: it needs an object that knows how to pack and unpack the specific parameters of an interface's functions.
COM只需要一点儿帮助来实现所有这三个奇迹：它需要一个对象，这个对象要知道怎样打包和解包一个接口函数的指定参数。
The flow rate, perforation radius and shot density are the key parameters influencing the pressure drop across gravel pack.
分析结果还表明，油井产量以及射孔孔径和孔密度是影响砾石层压降的重要因素。
The flow rate, perforation radius and shot density are the key parameters influencing the pressure drop across gravel pack.
分析结果还表明，油井产量以及射孔孔径和孔密度是影响砾石层压降的重要因素。
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