The reason is that we need references to both ProgressBars as arguments to the callback, and at the time the Scale constructor is invoked, they are not all defined yet.

原因在于，我们需要以对两个ProgressBar的引用作为回调的参数，而当Scale构造函数被调用时，它们还没有被定义。

youdao

The Report from Iron Mountain, among other documents in the public domain, references the organized and orchestrated requirement for war in order to maintain macro-scale economic and social stability.

相对公共领域的其他纪录片，《来自铁山的报告》提到了为了保持大规模的经济和社会稳定，需要组织和策划战争。

youdao

The building's location within a conservation area prompted the architects to develop a proposal that is sympathetic to its context, and references the scale of the neighbouring buildings.

建筑的位置在交流区内，促使建筑师想出一个建议——支持其所处的环境，并参考邻近建筑物的规模。

youdao

Accepted ideas of "suitability" assume a certain uniformity of period or style and favor respectful references to existing cornice lines and the replication of material and scale for a largely illusory connection between old and new.

WSJ: Cooper Union's New Building, at 41 Cooper Square | By WSJ Architecture Critic Ada Louis Huxtable