But the U. S. Army Air Corps did begin to take it seriously in 1939, tasking Caltech, including Qian, to develop rockets to help bombers take off. 。。。
基于1个网页-相关网页
including qian
包括钱
以上为机器翻译结果，长、整句建议使用 人工翻译 。
应用推荐
模块上移
模块下移
不移动