Translate the following sentence into English.
作为穷人家的长子，他在孩童时期就懂得了自己的责任是帮助父母。
【正确答案】：
AS THE ELDEST SON OF A POOR FAMILY, HE CAME TO UNDERSTAND IN EARLY CHILDHOOD THAT HIS DUTY WAS TO HELP HIS PARENTS.
【题目解析】：
核心：（作为穷人家的长子），他（在孩童时期就）懂得了自己的责任（是帮助父母）。
考点：长子 the eldest son，在孩童时期 in early childhood。