就我而言，截止点(cutoff point)大约是50行代码，但有些开发人员会说，如果某一方法需要您向下滚动整整一天才能看完，那么该方法太长了。

For me, the cutoff point is more like 50 lines of code, whereas some developers would say that a method is too long if it requires you to scroll down to see its entire body.

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采用矢量场法，得到了在弱导条件下传导模式的特征方程和截止频率的近似计算公式。

The eigenvalue equation and approximate formula for cut-off frequencies of guided modes are obtained by vector-field-method.

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分析了检测信号的特征，并采用截止频率法成功地提取了微弱的缺陷回波信号。

The characteristics of the test signals were analyzed and weak defect echo signals were successfully extracted by cut-off frequency technique.

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