difficultadj.困难的;艰难的;(人)难对付的;不易相处的
difficult position in humanism人文困境
difficulties in reconstruction改造难点
difficult-to-cut materials难加工材料
Difficulties of identification识别难点
difficult withdrawal of needles滞针
difficult mining copper deposit难采铜矿床
difficulties of the development发展困境
difficult lying- in diagnoses难产诊断