1.   To generate this distribution of viscous stress, the mean velocity profile must rise steeply at the wall and then become comparatively flat.

2.   The skates and rays, relatives of sharks, have become flat in what might be called the obvious way.

3.   Plaice, sole, halibut and their relatives have become flat in a different way.

4.   These cells are round at first but become flat as they approach the surface of the skin.

5.   What was understated on the page, though, becomes flat in the movie version.