例句與造句

1. UKRA also maintains a comprehensive set of tables of UK amateur and experimental rocketry records, and a procedure to enable records to be verified.
2. In 1936, K醨m醤 engaged the legal services of Andrew G . Haley to form the Aerojet Corporation, with his graduate student Frank Malina and their experimental rocketry collaborator naturalized citizen of the United States.
3. It's difficult to find experimental rocketry in a sentence. 用experimental rocketry造句挺難的