八成海域未經探勘
The ocean is a huge body of salt water that covers roughly 71 percent of Earth’s surface.
海洋是一個巨大的鹹水水體，覆蓋約71%的地球表面，
cover(v.)覆蓋;涵蓋
It is divided into four regions: the Pacific, Atlantic, Indian, and Arctic oceans.
分為太平洋、大西洋、印度洋與北冰洋四大海域。
divide sth. into=將…分成
Since 97 percent of the world’s water is in the ocean, it strongly influences the weather, temperature, and food supply for Earth’s living organisms.
由於海洋佔地球水源的97%，因此對氣候、氣溫以及生物的食物供給都有著很大的影響。
influence(v.)(n.)影響(力)supply(n.)(v.)供給organism(n.)有機體;生物
Despite the ocean’s importance to every organism on Earth, it largely remains a mystery.
雖然海洋對地球上的生物極為重要，但海洋始終是個謎樣的存在。
importance(n.)重要性
Over 80 percent of the ocean has never been explored or even seen by humans.
至今仍有八成以上的海域未經人類探勘或觀測。
explore(v.)探索;勘查;探測
We have mapped more of the moon and even Mars than our own ocean floor.
我們在月球或火星上的足跡都比海底來得多。
map(n.)地圖(v.)繪製地圖
Furthermore, some scientists estimate that more than 90 percent of the ocean’s species have yet to be discovered.
而且有些科學家估計九成以上的海洋物種仍有待發現。
estimate(v.)估計;估算species(n.)物種have yet to RV=還沒做某事discover(v.)發現;首次找到
Scientists currently know of around 226,000 ocean species, but there could be up to a few million more left undiscovered.
科學家至今已確認約22.6萬的海洋物種，而未發現的物種可能多達數百萬。
up to=多達;高達…
With such limited knowledge about our ocean, there is bound to be many new and exciting discoveries to be made in the future.
由於我們對海洋的了解所知甚少，未來一定會有更多新鮮刺激的事物等著我們去發掘。
limited(adj.)有限的be bound to RV=必定會做某事