再看了一遍你上麵引用的文字，

A will is an essential back-up device for property that you don't transfer to yourself as trustee. For example, if you acquire property shortly before you die, you may not think to transfer ownership of it to your trust -- which means that it won't pass under the terms of the trust document. But in your will, you can include a clause that names someone to get all of the property that you haven't left to a specific beneficiary.

上麵的這個意思隻是在用will賭漏洞. 是假設你有了自己的trust，但在去世前又買了塊地，卻忘了把它加入你原來的trust裏麵。如果你有個will說明你死後的一切財產都歸於你指定的受益人，就不會有遺漏的麻煩了。