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。

youdao

More than 25 tons of oil-eating bacteria and dozens of oil-skimming vessels are being used to remove the slick, after a pipeline explosion and fire on Friday sent tons of crude spilling into the sea.

在管道运输爆炸和星期五的火灾发生后，大量原油溢入大海，超过25吨的吃原油的细菌和数十条清理原油的船只顺利的将原油移除。

youdao

TRACK ACROSS the faces of the clan, a sea of eyes in flickering fire-light.

镜头摇过族人们的脸。 无数的眼睛闪烁着火焰。

youdao

I have said it will be a sea of fire, a sea of flames.

VOA: standard.2010.07.13

Despite coming under fire from the air, sea and land, they held out against a force of more than 3, 000 Germans for seven days.

BBC: Poland remembers World War start

Though a program displays panels showing all the critical processes of a real rig (fire and gas detectors, valve status, oil flow from the sea bed and so on), and then responds to the actions of the trainee by altering these displays appropriately, a human operator can intervene at any time if things seem to be going too smoothly.

ECONOMIST: Virtual reality