贝拉，我觉得很难过，因为我们应该在100秒后轮流荡秋千。

Bella, I feel sad because we were supposed to swing in turns after 100 seconds.

youdao

目前哈勃常数最被广泛认可的值是每秒每百万秒差距72千米，这个值是由哈勃空间望远镜测出的。

The most widely accepted value for the Hubble constant right now is 72 kilometers per second per megaparsec, obtained by the Hubble Space Telescope.

youdao

跟着他又不见了，不到千分之一秒，他又站在乔纳森肩旁。

Then he vanished again and stood, in the same millisecond, at Jonathan's shoulder.

youdao