The most amazing thing about these butterflies is that they return to the very same trees in Mexico that their great-great-grandparents used the winter before.
关于这些蝴蝶最令人惊奇的事情是，它们返回墨西哥的同一棵树，那是它们的高祖父母曾经在冬天栖居过的树。
2
"You became a great-great-great-grandmother last week, " shouted Sally.
莎丽喊道：“上周你成为曾曾曾祖母啦。”
3
Her own mum is alive, and so too is her grandmother, who will become a great-great-great grandmother.