反复煮
Boil repeatedly
以上为机器翻译结果，长、整句建议使用 人工翻译 。
因为液比较低且蒸煮器外壳不需要反复加热和冷却，所以连续蒸煮器的能源消耗要小一些。
The continuous digester should have lower energy requirements because the liquor-to-wood ratio is lower and because the digester shell is not alternatively heated and cooled.
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