| 1 | His eyes were warm and kind and he had a wonderfully wise look on his face. | |
| 2 | Densitometer: An optical instrument used to measure the intensity of transmitted or reflected light. | |
| 3 | It shows the progress, or otherwise of renewable energy in the fuel mix. | |
| 4 | By determining when this transition took place, scientists can pin down the start date of the helium-ionization era. | |
| 5 | The coating structure is characterized by direct image of TEM and indirect analysis of component. |
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