sterile

adj. 不毛的,不孕的,无菌的,枯燥的,无效的,贫瘠的

step-, step-father, step-ladder, step-parent, stepbrother, `stepsister, stepchild, stepfather, stepfather, `stepmother, stepparent, steppe, stepping-stone, stepson, `stepdaughter, stereo, stereo-, stereophonic, stereoscope, stereoscopic, stereotype, stereotyped, stereotyping, sterility, sterilization, sterilization, sterilisation, sterilize, sterilize, sterilise, sterling, stern, sternly, sternness, sternum, steroid, stertorous, stertorously, stet, stethoscope, stetson, stevedore, stew, steward, stewardess,