“犁头”的英语？

他望着海面,看到两条犁头鲨游近来了.Watching, he saw two shovel nosed sharks closing in.让你的大车和犁头碾着死人的白骨前进吧.Drive your cart and your plow over the bones of the dead.研究了氢化可的松生产菌蓝色犁头霉原生质体的形成与再生.Protoplasts were obtained from Absidia coerulea...