Parents have the duty to socialize their children to interact harmoniously with others.

socialize 是动词，由名词 social（社会的）加上动词后缀 -ize 构成，意思是"使社会化"或"使适应社会"。在这里指父母帮助孩子学习社会交往技能，使其能够融入社会并与他人和谐相处。