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.
パジャマとティーシャツがめくれて、薄い肋骨の下に、ぺちゃんこの腹が見えた。
ぱじゃまとてぃーしゃつがめくれて、うすいろっこつのしたに、ぺちゃんこのはらがみえた。The pyjamas and T-shirt rode up, and a flat stomach showed beneath thin ribs.