Aberration has 4 syllables and the stress is on the third syllable.
# | Sentence | |
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1. | It wasn't an aberration. | |
2. | Investigators learned that the telescope’s primary mirror suffered from a production error, its edges too flat by 0.003 mm, resulting in an optical problem called spherical aberration. | |
3. | Since the magnitude of the spherical aberration was well-defined, engineers designed a set of mirrors that astronauts could place aboard Hubble during the previously planned first servicing mission. |