My son has had a low-grade fever for several days.我儿子已发了几天的低烧。The jacket is made of some low-grade material.这件夹克是用某种劣等料子做的。The patient ran only a low-grade fever.病人只有一点点热度。I'd done my spell in life of pigging it in a low-grade place.我终于结束了在贫民区艰难度日的生活。