"They were the best of times, they were the worst of times": the most famous opening sentence in English literature. I want to share briefly a tale of two planets. Earth and Venus are exactly the same size. Earth's diameter is about 400 kilometers larger, but essentially the same size.
“ 这是最好的时代， 也是最坏的时代，”在英国文学中最著名的 开场词。我想简单地和大家分享一下 “双星记。”地球和金星 大小一样。地球的直径 比金星长约400千米，但是在实质上二者还是一致的。