27.受到古老海洋生物的袭击 be attacked by ancient sea creatures

26.穿过森林 go through forests

25.通过煤层和大理石层 pass through the layers of coal and marble

24.进行冒险 go on this adventure

23.从……开始　 begin with

22.所有的才在蓝色的海水中随波起伏,慢慢移动

all waving and moving slowly in the blue waters

21.发现自己被包围find themselves surrounded by

20.穿着潜水服dressed in diving suits

19.可以看见水底世界 give a view of the underwater world

18.越洋航行on a voyage across the oceans