在表达我们的感谢时，我们必须记住，最深的感谢不是动动嘴皮子，而是要身体力行。——约翰·菲茨杰拉德·肯尼迪

As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them. ——John Fitzgerald Kennedy