...if there's one thing we've learned from the past... 历史告诉我们
if a male arrives too late to find a female. 那就会白跑一趟
they might have reached if their reign had continued. 能达到何种新的高度 谁都不知道
But frogs are nothing if not persistent. 但青蛙生性坚持不懈
If scaled up to human proportions, 如果按照人类的比例放大
if conditions on Earth had remained the same. 今天恐龙可能仍在统治世界