Also, because the molecular motion of a gas depends on temperature, at the low temperatures of the Jovian planets even the lightest gases are unlikely to acquire the speed needed to escape.

One of the most difficult skills to acquire in a foreign language is the ability to understand the natural language spoken by native speakers at a normal speed.

We also have intelligence from multiple sources that Iraq is attempting to acquire magnets and high-speed balancing machines; both items can be used in a gas centrifuge program to enrich uranium.