发射物

例句：

1. 1. The spacecraft was equipped with a variety of launch materials to ensure its successful launch.
   这个航天器装备了各种发射材料，以确保其成功发射。
2. 2. The rocket's engine is made from a special type of metal that can be easily launchedinto space.
   火箭的发动机是由一种特殊类型的金属制成的，这种金属可以很容易地被发射到太空中。
3. 3.The scientists carefully selected the best launch materials for their experiment.
   科学家们仔细选择了最佳的发射材料来执行他们的实验。