我想要表达的就是，有选择就必须要有牺牲。比如放弃和家人在一起的时光，和朋友出去逛街，做一个称职的朋友，做一个孝顺的孩子等等很多例子。What I want to express is that if there is a choice, there must be sacrifice. Such as giving up time with family, going shopping with friends, being a competent friend, being a filial child and so on.