1.The sea was scoured by powerful nets, and there was tremendous excitement on board when a chest was raised from the bottom.
他们用密实的网对大海（海床）进行彻底的搜寻，当一只箱子从海底打捞上来，船上的人们很兴奋（兴奋不已）。
2.The sea bed was scoured with powerful nets and there was tremendous excitement on board when a chest was raised from the bottom.
他们用结实的网把海床搜索了一遍。当一只箱子从海底被打捞上来时，甲板上人们激动不已。
3.there was tremendous excitement on board when a chest was raised from the bottom.
当从海底提上来一只箱子时，船上出现了极为兴奋的场面。