When InitField or (more likely) a subtype of it is instantiated
他对南方周末记者解释，这一趋势有三大动因：全球国际秩序大变革，国际货币秩序变迁，以及科技周期驱动。。关于这个话题，91视频提供了深入分析
。关于这个话题，heLLoword翻译官方下载提供了深入分析
If we don’t do this with lists, if we don’t make += do the in place assignment, if we don’t leave it open for types to do their own thing, depending on the circumstances, then there’s no value in += in the first place, because it’s just syntactic sugar for +.
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