Sometimes we get sad about things and we don’t like to tell other people that we are sad about them. We like to keep it a secret. Or sometimes, we are sad but we really don’t know why we are sad, so we say we aren’t sad but we really are.
在科学中最令人兴奋的短语，预示着新发现的不是“我找到了！”，而是“这有点奇怪……”
"Your attitude determines your direction."
