The brave men,living and dead, who struggled here, have consecrated it, far above our poor power to add or detract.

VOA: special.2009.11.12

You can add something else to the answer without invalidating it, and that is anything with one power of t in it, because if you take one derivative it'll survive, but if you take two derivatives, it'll get wiped out.

你可以往答案后面加上其它东西,而且不影响结果,也就是任何t的一次项,因为你求一次导数之后它还在,但如果你求两次导数,这一项就不存在了

耶鲁公开课 - 基础物理课程节选

The brave men,living and dead,who struggled here,have consecrated it, far above our poor power to add or detract.

VOA: special.2009.02.06

But,in a larger sense, we can not dedicate - we can not consecrate - we can not hallow,this ground - The brave men, living and dead,who struggled here, have hallowed it, far above our poor power to add or detract.

VOA: special.2011.02.07