If the relationship between the two classes were one of reference rather than of inheritance, then the error would be thrown on the first active use of a, rather than during the loading of a.

如果两个类之间的关系是引用关系而不是继承关系，那么会在第一次使用a时抛出错误，而不是在装入a时抛出。

youdao

Although we aren't usually fans of metrics such as statement-lines-of-code (SLOCs), they were certainly interesting in this case (see Error! Reference source not found.).

虽然我们不是度量分析的狂热者，比如，代码行陈述(SLOCs)，但是在这个例子中度量分析的确是很有趣的。

youdao

From system model selected, the lengths of hypothetical reference digital link and digital section are chosen, then the properties of bit error and jitter are determined.

从选定的模型，决定了假想参考数字通道和数字段的长度，确定了误码性能和抖动特性的指标。

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