There are diminishing returns in slow steaming with machinery designed to operate at higher outputs - particularly when reducing speeds to below 20 knots.
为更高马力设计的机器在减速中是效率递减的，特别是减速至20节以下。
The steaming of milk was too slow, cumbersome, and the bottleneck of coffee operations.
蒸汽打牛奶费时费力，成为咖啡制作的瓶径。
The steaming of milk was too slow, cumbersome, and the bottleneck of coffee operations.
蒸汽打牛奶费时费力，成为咖啡制作的瓶径。
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