Diamonds have extreme resistance to abrasion.钻石极抗磨损.Erosion of pipes and vessels from abrasion by particles can be serious.由于固体颗粒的磨蚀作用,管子和容器的磨损严重.Abrasion also abets wind erosion.磨损作用也助长了风的侵蚀....
If the groundhog wakes and sees his shadow, six weeks of winter!如果土拨鼠看到了它的影子, 那么冬天还要持续六周!BEAVER: Don't worry Mister Groundhog, we'll get the job done.海狸: 放心吧,土拨鼠先生, 我们会把活儿都干完的.Groundhog Day is every February 2....