【化】 局部硫化

spot market

twin spot

field audit【审计】;on-the-spot audit【审计】;onsite audit【审计】

soft spot; Achilles'heel

silent zone【通信】;blind spot【通信】;dead band【通信】

spot flooding

spot

镀锡板缺陷\nblackspot【机】;dark spot【电子】[专业]太阳的\nmacula【天】;shading【电】视