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。

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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。

youdao

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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