I like dogs. You always know what a dog is thinking. It has four moods. Happy, sad, cross and concentrating.
我喜欢狗。你总是知道狗在想什么。它有四种情绪:开心、难过、生气和专注。
在数学中,你不理解事物。你只是习惯了它们。
The only limit to our realization of tomorrow is our doubts of today.