The entire arrangement makes it easy for this bifocal fish to spot a tasty bug flying above the water, or a bit of algae below.
这个构造使四眼鱼能够很轻松地发现一只从水面飞过的美味的虫子，或者水面下的一点水藻。Corals live in tropical waters throughout the world, generally close to the surface where the sun's rays can reach the algae.
珊瑚生活在全球的热带水域，通常靠近太阳能够照射到水藻的表面。The good news is that the blooms tend to be really patchy, so it may involve going just a few miles up the road to find an unaffected beach.
好消息是（水藻）开花只趋于是在局部区域，所以只要继续行进数公里就可找到未受（红潮）影响的岸边。Over the centuries, these sparse pastures have been built over time by fertilizing the rocky soil with seaweed found along the beach.
数世纪以来，这些稀疏的草场是通过不断向布满岩石的土地里施以海滩上找来的水藻作肥料而慢慢建成的。And a piece of an old ship that lies on the shore.
如今废弃的沙滩只剩几片水藻，还有一艘破船在岸边停靠。Algae is considered to be a promising potential feedstock for biofuels, as certain species of algae contain high amounts of oil.
水藻被认为是一种非常有发展潜力的生物燃料，一些特殊的水藻含有大量的油料。But those near the main Hawaiian island population centers are under pressure from sediment found in runoff, overfishing and invasive algae.
但是，生长在夏威夷主岛的人口聚集地附近的珊瑚礁却面临着径流沉积物、过度捕捞以及扩散性水藻等重重压力。The finer the weather, the greener the algae will be. On account of the green spirit, the water can't bear to freeze.
天儿越情，水藻越绿，就凭这些绿的精神，水也不忍得冻上；An old shellfish or turtle with a growth of algae on its back.
绿毛龟一种背上有绿色水藻的老的水生贝壳类动物或海龟