1. A process that nevertheless remains more of a guessing game than a science.
    不过这种做法更像推测游戏而非科学。

2. You don´t know. You´re just guessing!
    你不知道. 你只管猜!

3. I have never been good at guessing weight, but I know Sam feels awfully heavy when I carry him around the city all day.
    我从不擅长猜测体重，但我知道我整天抱着他在街上走时感觉他非常重。