There are many factors influencing spontaneous combustion in goaf and their relative essentialities are different.采空区自然发火的影响因素很多,各因素之间的相对重要性不同.The disease has an unpredictable course with exacerbations and spontaneous re...
I had another spontaneous miscarriage at around the 16th to 18th week.我在大约第16至18孕周时又经历了一次自然流产。spontaneous outpourings of praise一片自然迸发的赞美声a spontaneous offer of help主动提出帮助...