are at the pains of〔名词〕刻苦详细»
are at the pains of〔名词〕刻苦详细»
刻苦arduousness;assiduity;assiduousness;be at the pains of;grind详细»
刻苦am at the pains of;are at the pains of;is at the pains of;was at the pains of;were at the pains of详细»
刻苦am at the pains of;arduousness;are at the pains of;assiduity;assiduousness;was at the pains of;were at the pains of详细»