英语经典成语英语经典成语函数的最值>玛丽的英文A friend in need is a friend indeed.患难朋友才是真正的.朋友Actions speak louder than words.事实胜于雄辩All is not gold that glitters.闪光的不一定都是金子网页转二维码An idle youth, a needy age.少壮不努力,老大徒伤悲卤菜的配方Bi
封标Thermal conductivityIn physics, thermal conductivity, , is the property of a material's ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Thermal conductivity is me