公证遗嘱由遗嘱人经公证机关办理。

A notarial will is one made by a testator through a notary agency.

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遗嘱人可以撤销、变更自己所立的遗嘱。

A testator may revoke or alter a will he previously made.

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遗嘱是一份在遗嘱人死后执行的意图声明。

A will is a declaration of intention that will be carried out after the death of the maker.

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Since many people write wills, many people take out life insurance, it seems as though the natural thing to suggest is that many, or at least perhaps most, at least many people believe they're going to die.

既然有很多人写遗嘱，很多人上生命保险，似乎很自然地可以得出，至少大部分人，至少有很多人是相信自己会死的。

耶鲁公开课 - 死亡课程节选