| Phrase | Audio |
|---|---|
| Adam Smith offers a detailed answer to that question. | |
| One experiment that he conducted was detecting the number of particles. | |
| Essentially, what he found was the relationship between the length of solar cycle and temperature. | |
| The article mentions there are several different ways of looking at differential equations. | |
| That was invented in the 1950s by a scientist, Henry Lee. |