
There are several fundamental forces that hold our universe together. One of these, of ...
懂你英語Level 5學(xué)習(xí)筆記 Level 5 Unit 1 懂你英語Level 5 Unit 1 Part 1 Listening 懂你英語Level 5 Unit 1 P...
Winning a Lottery A: Guess what? I've just won the lottery, 50 million dollars. B: You ...
音頻 Silly, foolish or stupid or ridiculous, the opposite of serious. He's being silly, s...
音頻 As you can see, everything depends on the flow of blood to and from the heart. So ho...