在使用固体燃料的火箭中，燃料混合物的反应比较缓慢而稳定，而不是爆发性的。
In a solid-fuel rocket the reaction of fuel mixture is relatively slow and steady rather than explosive.
它们生气蓬勃又可爱，但同时专注、认真且具爆发力，有点像幼儿园小朋友与奥林匹克运动员的混合物。
They're exuberant and adorable but also focused, intense and explosive—sort of life kindergartners crossed with Olympic athletes.
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