1. Many animals have a single lens used to focus light on to a plate able to convert it into nerve impulses. 2. If the mirror is made with a convex surface, it can be used to focus X-rays. 3. As a result, the process occurs in a vacuum and mirrors are used to focus the light. 4. The banter is less a sign of disagreement than strategy Posada uses to focus Hernandez. |
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