| Save for contrived laboratory studies with bacteria and fruit flies, it cannot be witnessed. |
| Once the virus samples arrived from Hong Kong the experiment and laboratory analysis took only two weeks. |
| The life cycle of the tapeworm can be readily completed under laboratory conditions. |
| The spectral variability of natural materials has been known for a long time from laboratory studies. |
| This is typically an instance where people taking part in laboratory experiments appear to act irrationally. |
| The predictions of these models are in agreement with results from laboratory studies. |
