The heat transfer data of nucleate pool boiling on a smooth flat surface were measured in HC170/HFC23 system.

实验测量了新型共沸混合工质HC170/HFC23的池核沸腾传热特性。

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The width of the wake is larger and the base pressure of the plate is lower in comparison with the fully turbulent wake behind a smooth flat plate at the same flow conditions.

与在相同流动条件下光滑平板后的湍流尾流比较，涡街尾流较宽，平板底部压力较小。

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This kind of skating is generally done on smooth flat surfaces and is normally focused on technique and flow.

这种轮滑运动通常是在平滑的地面进行的，并且通常情况下考验你的技术和连贯度。

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Railroad companies employed thousands of workers to create the smooth,flat pathways required by trains.

VOA: special.2009.02.21

Blurred footprints, a smooth flat stone good for skimming.

NEWYORKER: Getting Closer

Over the centuries, the river had slowly carried away mountainsides, tumbling and cracking rock, reducing boulders into a rainbow of smooth, flat stones the size of a child's hand.

CNN: The seven stones of simpler living

The plastic must also be flat and smooth for the reading to be accurate, and the object must be brought to the machine (which is not very portable) for analysis, which takes yet more time.

ECONOMIST: Recycling