YOU SAID:

Missiles spend most of their lifetime not exploding

INTO JAPANESE

ミサイルは生涯のほとんどを爆発せずに使います

BACK INTO ENGLISH

Missile uses most of its life without exploding

INTO JAPANESE

ミサイルは爆発することなくその人生のほとんどを使用します

BACK INTO ENGLISH

Missile uses most of its life without exploding