In line 13, the bind_ callback method from the class zk.Widget is overridden to run the update() method and set the first list item as the selected one after the listbox is bound to the DOM tree.

第 13 行，来自类 zk.Widget 的 bind_ callback 方法被重写来运行 update() 方法，在 listbox 被绑定到 DOM 树之后，设置列表第一项作为选中项。

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The direct current demagnetization method was selected to this auto-inspection line of tubing.

针对油管漏磁自动检测过程中的剩磁，选用了直流退磁方法进行退磁处理。

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The linear least square method should be selected to fit engineering data to a straight line.

在工程数据线性拟合时，宜选用线性最小二乘法。

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