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.
（三）后处理，是指对反应堆乏燃料进行处理，以分离其中的裂变产物，并回收可裂变物质的过程。
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Dig leader Peter Crawley said he had a gut feeling about the site before the excavation began.
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