There was a huge bang; it sounded like a supersonic jet.传来一声巨响，听起来像是超音速喷气式飞机的声音。These planes travel at supersonic speeds.这些飞机以超音速的速度飞行.Supersonic flight could become a routine form of travel in the 21st century.搭乘超音速飞机会成...
These planes travel at supersonic speeds.这些飞机以超音速的速度飞行.In conclusion we note the following general items concerning flow in supersonic nozzles.最后,我们归纳几个关于超音速喷管流动的一般原则.In addition, the vehicle essentially surfs on the sup...
随着年龄的增长, 她脸上出现了黄褐斑.With the increase of age, chloasma began to appear on her face.结论治疗黄褐斑中药内服外用效果优于单纯中药内服.Conclusion Internal and external administration of herbs are effective for chloasma.特别针对老人斑 、 黄褐斑 、 雀斑和荷尔蒙斑,一次见效.O...
The enamel surface microhardness was measured by a Leitzs microhardness tester.采用维氏显微硬度仪测定经饮料浸泡后牙釉质表面显微硬度的变化.The microstructure and microhardness of ths laser nulted Fe - Sb alloys were studied.研究了激光表面熔化Fe-Sb合金的显微组织和显微硬度...