但她用了两年的时间恢复、训练，终于在2017年完成了个人登顶珠峰的目标。
For implementers, this promise-heavy design constrains optimization opportunities. The spec mandates specific promise resolution ordering, making it difficult to batch operations or skip unnecessary async boundaries without risking subtle compliance failures. There are many hidden internal optimizations that implementers do make but these can be complicated and difficult to get right.。关于这个话题，Line官方版本下载提供了深入分析
常用于： EfficientNet、Transformer。，这一点在同城约会中也有详细论述
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