因为最近员工的出勤不太正常，我们的头波卡普先生很不幸地选择了今天早晨搞突然袭击。

There has recently been much irregularity in the attendance of the clerks, and Mr. Perkupp, our principal, unfortunately choose this very morning to pounce down upon us early.

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“这是个坏兆头。”波莉姨妈严肃地说。

"It's a bad sign," said Aunt Polly, gravely.

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“我们的理论在我们开始在数据中观察它们之前，预测了这些波头的摆动，”他说。

"Our theory predicted these oscillations before we began to observe them in our data," he says.

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So, we'll take a little bit of a step back after we introduce quantum mechanics, and talk about light as a wave, and the characteristic of waves, and then light as a particle. And one example of this is in the photoelectric effect.

等我们介绍完量子力学后,我们要回过头来讨论下光,作为一种波和它的波动性特征,以及光作为一种粒子,其中的一个粒子就是光电效应。

麻省理工公开课 - 化学原理课程节选