划分下句子结构.What matters in life is not what happens to you but what you remember and how you remember it.
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What matters in life（主） is not （系动词）what happens to you（表语从句） but what you remember and how you remember it.（what...how...引导的也是表语从句）
生活中关键的不是发生在你身上的事而是你要记住的以及怎么样记住这件事.