Individually the algae are tiny but together, they produce three quarters of all the oxygen in our atmosphere. 单体藻类虽然很细小 但它们共同产生了我们大气中四分之三的氧气
In the spring, as the sun daily climbs higher in the sky 春天 太阳高悬空中
In winter, the temperate seas are lashed by violent storms. 在冬季 气候温和的海域被风暴肆虐着
He's almost doubled in size and his days in his tropical nursery are coming to an end. 它的身材也大了一倍 在热带托儿所的日子也到头了
It has been a warm and safe place in which to grow up 在这个地方长大温暖而安全
from being another desert in the sea. 阻止海湾变成另一个海中沙漠
Although most life in tropical waters is concentrated around the coral reefs and the seagrass meadows, 虽然多数热带海洋生物 聚集在珊瑚礁或者海洋牧场里
Now they're in real danger of being stranded 现在它们有搁浅的危险