1. I've spoken at a few university commencements, and my message is always pretty much the same.
我在几所大学的开学典礼上都讲了话，观点几乎是一样的。
2. As the mists close around the retreating memory of our own commencements, some of us have evidently lost touch with the genre of the graduation day address.
随着我们对自己毕业典礼的渐渐遗忘，我们中的有些人显然已经不再知晓毕业当天的演说词该有什么样的风格。
3. We learned when the planes landed safely, when the malls stayed open, when the commencements came and went, when one baseball season gave way to another.
当飞机安全降落，当所有的购物商场开始营业时，当毕业典礼开始了又结束时，当一个棒球赛季让位给了另一个赛季时，我们都学到了很多。
4. △ Z (Changes in the Vertical field) for the sudden storm commencements and geomagnetic bays to the northeast and southwest of this line appear opposite in signs.
此线的东北与西南，地磁湾扰、磁暴急始等短周期事件垂直分量的变化△z呈现反号。