This paper introduces mechanism, research methods and main results about microbubble dray reduction.

该文介绍了微气泡降阻机理 、 研究方法和重要结论.

互联网

A dray is a type of horse - drawn vehicle.

雪橇是一种马拉的交通工具.

互联网

She stood doggedly in checkout lines; she toiled like a dray - horse up the Hill back home.

她顽强地支撑着排在付款的队里; 她像拖载重物的老马艰难地爬上山回家.

互联网