The material which the liquid-propellant rockets burn to make the jet gases is liquid. This is something like gasoline, or kerosene, or alcohol that can brun.

液化推进火箭通过燃烧产生喷气的材料是液体；这种液体有点像汽油、煤油或酒精一类燃料。

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Danielle Le Brun, from the club, said: "He has taken a liking to the helicopter. He would chase it and try to get as close to it as possible which is not safe for him or the helicopter."

来自俱乐部的丹妮尔说：”他喜欢上了直升机，他会跟着直升机飞，而且还试图靠得非常近，这不管是对他还是对直升机来说都不安全。

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Danielle Le Brun, from the club, said: "He has taken a liking to the helicopter. He would chase it and try to get as close to it as possible which is not safe for him or the helicopter."

来自俱乐部的丹妮尔说：”他喜欢上了直升机，他会跟着直升机飞，而且还试图靠得非常近，这不管是对他还是对直升机来说都不安全。

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