為什麼船底要塗成紅色？ Red beneath the Sea
DEC. 18,2023/Analytical Editors 
When large ships carry a lot of cargo, they sit quite low in the water. However, if a ship is empty, you'll likely be able to see its lower hull, which will probably be painted red. There are several reasons why special paint of this color is used for marine vessels.
First and foremost, the red paint shields the underside of the ship. If left unprotected, the hull will eventually become covered with marine organisms such as barnacles, algae, and mollusks, which will cause damage to the metal in the long run. Red marine paint gets its red color from copper oxide. This material acts as a biocide, a chemical compound that repels and prevents the growth of organisms. In addition, the paint guards the metal of the hull against corrosion from salt water, which can greatly weaken the structure and cause leaks. ...
當大型船隻乘載許多貨物時，它們在水中會沉得相當深。然而，如果船隻是空的，你可能會看到船身的下半部，它大概會被漆成紅色。有幾個原因解釋為什麼海洋船隻要使用這種顏色的特殊塗料。
首先，紅色塗料保護著船的底部。如果不受保護，船底（編按：此處及之後出現的 hull 皆是指前一段提過的 lower hull，為避免重複，因此只用 hull）最終將會被像是藤壺、藻類和軟體動物等海洋生物所覆蓋，到頭來會對金屬造成損壞。紅色海洋塗料的紅色來自於氧化銅。這種原料作為生物滅除劑 ── 一種驅趕並防止生物生長的化學化合物。此外，該塗料能保護船底的金屬免受鹽水的腐蝕，腐蝕可能會大大地使結構變得不結實並導致漏水。 - cargo n.（船、飛機、車輛裝載的）貨物
- First and foremost 首先，
- shields vt. 保護
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