1) Seas change into mulberry fields and mulberry fields change into seas--time brings great changes to the world.
沧海桑田
2) time brings a great change to the worlds
沧海桑田
3) Seas change into mulberry fields and mulberry fields change into seas time brings great changes to the world What was once the sea has now changed into mulberry
沧海桑田
4) ups and downs of time
沧海桑田
5) Seas change into mulberry fields and mulberry fields change into seas--time brings great changes to the world. / What was once the sea has now changed into mulberry fields--the world is changing all the time.
沧海桑田
6) drop in the bucket
沧海一粟/九牛一毛a
补充资料：沧海
大海的水呈青绿色，因指大海：面向沧海，思量着未来。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。