用51A造句子，“51A”造句

2、More X-51A flights are expected as early as this fall.

1、TEST 51A CONTINUED FROM THE PREVIOUS PAGE.

3、The X-51A burned for more than 200 seconds and accelerated the craft to five times the speed of sound.

4、X-51A起動超過200秒，促使飛行器速度提高到音速的五倍。