The propellant is very hygroscopic (absorbs moisture) and as such is sealed in a plastic bag and stored in a freezer.
推进剂是非常吸湿性（吸收水分） ，正因如此，是密封在一个胶袋，并储存在冰箱。
The propellant is very hygroscopic and as such is sealed in a plastic bag and stored in a freezer.
推进剂是非常吸湿性，正因如此，是密封在一个胶袋，并储存在冰箱。
The blasters themselves are both futuristic plastic shells for a basic air propellant system.
该炮本身都是未来塑料壳的基本空气推进系统。
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