告诉孩子，其实像袋鼠跳跳一样，无论想要得到有力的胳膊、健壮的大腿还是灵巧的手指和聪明的头脑，都不会有大神送给你，尽管有遗传因素的帮助，但最终还是要靠艰苦的锻炼。

Just like a kangaroo, whether you want strong arms, strong thighs, dexterous fingers, or a smart mind, no god will give it to you. Although there are help from genetic factors, in the end you still have to rely on hard work. exercise.