她在打软式墙网球时扭伤了脚踝.She sprained her ankle playing squash.软式充填氦气的飞船主要是由桑托斯- 杜蒙特 发展改进.The nonrigid helium - filled Blimp was principally developed by Alberto Santos - Dumont ( 1873 - 1932 ) .平流层飞艇平台可分为软式飞艇 、 硬式飞艇和半硬式飞艇.Stratos...