Whenyoureturnfroman 61 (enjoy)tripwithbagsfullofsouveni...
问题详情：Whenyoureturnfroman 61 (enjoy)tripwithbagsfullofsouvenirs,aself-movingsuitcasecouldconvenient.Now,thisisn’tadreamanymore.NuaRobotics, 62 high-techcompanyfromIstael, 63 (develop)asmartsu...