Cuban president says country will ‘defend itself with determination’ after deadly coastal assault by exiles
4 A good discussion on luminance and how to calculate it can be found on this stack exchange question. ↑
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从顾客视角来看，他们的核心预期很简单：安全、放心、真实透明以及被尊重。很多旺店最大的差评往往是“排队太久且无服务”——同样是排队，海底捞会提供小吃、饮用水，而有些门店让客人在寒风中苦等，自然会引发不满。
He pulled on a welder's helmet for protection. He packed it with powder, struck a match and ran like hell.
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