| 单词 | focus a beam |
| 释义 | focus a beam To minimise the spill area, focus the beam from flood to spot. Times, Sunday Times It's like those flashlights that you tighten the lid to focus the beam. Christianity Today A similar phenomenon happens if glass objects like mirrors or ornaments are left too close to windows and focus a beam of sunlight on to flammable material. Times, Sunday Times This reduces the ability to finely focus the beam. Retrieved from Wikipedia CC BY-SA 3.0 The plant uses concentrating parabolic mirrors to focus a beam of light on a tower making steam for electricity generating turbines. Retrieved from Wikipedia CC BY-SA 3.0 |
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