can trace its heritage back four billion years. 都可以追溯到40亿年前
The youngster refuses to back down. 年轻的骇鸟拒绝退让
The sunbeams that the ice sheet previously reflected back... 过去冰面可以反射阳光
Will have largely been pumped back out. 将被大量重新放
Whose rivers carry water back to the oceans. 而河流又将水注回了海洋
-Immeasurable cuteness, right there! -Good to be back. -无敌可爱 就在面前 -欢迎回归