Supposedly, it was developed by NASA as a solidrocketfuel.
据说,这种东西最早是由NASA作为固体火箭燃料而研发的。
2
Scientists at the Centers for Disease Control and Prevention tested the formula for the presence of perchlorate, a chemical used as the main ingredient in solidrocketfuel.
疾病预防控制中心的科学家专门针对高氯酸盐对配方奶进行了检测。
3
But once a solid-fuelrocket is ignited, it is off like a firework and keeps going until all the fuel is burned up.