暑過ぎよ。お願い、暖房ちょっと弱くしなさい。
It's too hot in here.　Please turn the heater down a little bit.

　私にはこれでちょうどいいけど..
It's just right for me though.

　Tシャツしか着てないからでしょ。
That's because you're only wearing a T-shirt.