These sentences were read aloud by real people — native Japanese speakers — for the open Mozilla Common Voice project. Listen to how a phrase sounds in real speech: the intonation, the pace, the way words run together. Two speakers mean two different people read it — compare them.
売れない理由をあげればキリがない
うれないりゆうをあげればきりがないIf I list the reasons why it doesn't sell, there's no end to it.
理由もわからず急にスマホが動かなくなる
りゆうもわからずきゅうにすまほがうごかなくなるWithout understanding why, my phone suddenly stops working.
しかしそこに国家の存在理由があるのでなければならない。
しかしそこにこっかのそんざいりゆうがあるのでなければならない。But the state's reason for existence must be there.