超声速

Part two: both numerical and experimental investigation on the cold flow field of a model dual-combustor scramjet.

超燃冲压发动机是一种新型的吸气式动力装置，在高超声速飞行器上有重要的应用前景。

Results show that the performance of this VCRT basically reaches the original objective,which indicates that a convergent-divergent blade passage in the high pressure rotor and a convergent-divergent meridian plane of the VCRT are suitable for the VCRT.

结果表明，对转涡轮各方面性能基本达到了设计目标，说明高压动叶采用收扩型叶栅通道且整个涡轮子午流道也采用收扩结构的设计可以获得满意性能；三排叶片仍有改进余地，即涡轮效率还有进一步提升的潜力；高压动叶出口沿整个叶高均为超声速，出口马赫数节距平均值在1.4~1.6之间；高压动叶尾缘斜激波强度以中展为中心向两侧递减；涡轮性能随出口背压的增加而下降；涡轮出口背压的变化对高压转子性能基本没有影响，但对低压转子性能的影响较大。

The A-4 soared supersonically to a history-making height of nearly 60 miles, functioned perfectly.

在1942年10月3号，A-4超声速的冲入创造历史的接近60英里的高度，运行一切正常。

The progenitor of the WR star may be a RSG moving eastward supersonically with the wind shocking against the ISM before hitting upon the molecular clouds. About~10〓yr ago.

该星的前身星，根据演化理论，可能是一红超巨星，向东以超声速运动，其星风与星际介质形成了弓激波，后来碰上分子云。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。