大家都搜：
超声膨胀
1、market expansion───[经] 市场扩展阶段
2、expansion valve───膨胀阀，安全阀；[机]膨胀阀；安全阀
3、expansion pack───扩展包
4、expansion───n.膨胀；阐述；扩张物
5、expansion card───扩充插件板[卡]；扩展卡；扩充插件板
6、thermal expansion───[热]热膨胀；热膨胀; 热胀
7、expansion joint───[建]伸缩缝；补偿器；[机]伸缩接头；膨胀节或缝；伸缩接头，伸缩节，补偿节，膨胀节[缝]，补偿器
8、expansion diffusion───[地理]扩展扩散
9、territorial expansion───[法]领土扩张
1、CH molecular beam was generated by DC pulsed discharging methane seeded in helium in the supersonic expansion to study the generation and features of CH molecular beams.───CH分子束及其相关特性，以氦气为载气，利用直流脉冲放电技术产生了CH分子束。
2、method is composed of two parts, the series expansion method in the transonic region and the characteristics method in the supersonic region.───该法由两部分组成，跨音速段用级数解，超音速段用特征线法。