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VI-EN VI-DE VI-ML 2000 3000 MCC 5000



assiduously eifrig volhardend assidûment assiduamente asiduamente ขยันขันแข็ง giúp đỡ 孜孜不倦
persistent hartnäckig volhardend persistant persistente persistente ดื้อดึง kiên trì 执着的