The crankshaft and connecting rods of an engine convert the rectilinear motion of the pistons to rotary motion of the flywheel.

It is only the first occurrence that appears as Ibn Umar al-Khattab. What, if any, significance this has I know not. Frankly, it's a rather lengthy article, and I'm just not that interested in the finer points of Koranology.

The least cornified, young cells stain violet or blue, more mature cells mauve and the most cornified, old and dying cells stain red.

Why, she is the image of Papa! A true Lacey! Don't you think so? A very true-bred heir, my darling!