One of the most difficult speeches to prepare is an address to a graduation class, which is why I don't often do them.

One of the most difficult speeches to prepare is an address to a graduation class, which is why I don't often do them.

最难准备的演讲之一是毕业演讲，这也是我不常做的原因。

-- Jerry Moran 杰瑞·莫兰