smokeless propellant

例句：

1. 1.The new rocket uses a smokeless propellant that burns much more efficiently.
   新型火箭使用一种燃烧效率更高的无烟推进剂。
2. 2.This spacecraft relies on a special type of smokeless propellant to reach its destination.
   这艘宇宙飞船依靠一种特殊的无烟推进剂到达目的地。
3. 3. The military is testing a new type of smokeless propellant for its tanks, hoping it will be more durable.
   军方正在测试一种新型的无烟推进剂，希望它能更耐用。