1·The bright red color of a fire urchin warns predators that its spines are poisonous. Sea otters are the major predators of sea urchins.
火海胆鲜红的颜色警告捕食者它的刺有毒。海獭是海胆的主要捕食者。
2·Sea otters are the major predators of sea urchins.
海獭是海胆的主要捕食者。
3·When the sea lion population crashed, they started fishing sea otters.
而又当海狮的数量变少后，虎鲸又开始猎杀海獭了。
4·Without sea otters keeping sea urchins in check, their population has exploded.
没了海獭约束海胆，海胆的数量变得庞大起来。
5·Aquarium workers rescue lost or hurt young sea otters and prepare them to survive in the wild.
水族馆的工作人员救下了迷路或受伤的小海獭，经过精心调养后，再将这些海獭放回野外。
6·Employees, and sea otters are dressed as Santa Claus and reindeers, attracting the audience.
员工和海獭扮成圣诞老人和驯鹿的样子令在场的观众很高兴。
7·A great number of sea otters climbed on the float bridge and huddled together to avoid oil.
成批海獭为躲开油污，爬上浮桥，在有限面积里挤作一团。
8·In the late 1980's, the population of sea otters in the North Pacific Ocean began to decline.
在二十世纪80年代，海獭在北太平洋的数量下降。
9·In those locations that orcas can access easily, the number of sea otters has declined greatly.
在那些逆戟鲸很容易进入的海域，海獭的数量急剧减少。
10·Fur hunters once pushed sea otters to the brink of extinction and a century ago only 1,000 to 2,000 individuals remained.
在一个世纪以前，毛皮猎人一度将海獭推向灭绝的边缘，当时只有幸存1,000到2,000只海獭。