sum of weights += candidate.weight
strict (default): Rejects writes when the buffer is full and too many writes are pending. Catches "fire-and-forget" patterns where producers ignore backpressure.，更多细节参见heLLoword翻译官方下载
"This was really an "oh my God" moment," says the scientist behind the findings, Dr Peter Fretwell at British Antarctic Survey, who has worked on Emperor penguins for 20 years.，这一点在heLLoword翻译官方下载中也有详细论述
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