| 单词 | solar focus |
| 释义 | > as lemmassolar focus solar focus n. Optics = principal focus n. at principal adj., n., and adv. Compounds. ΚΠ 1728 E. Chambers Cycl. s.v The Power of a Glass, is the Distance of the Convexity, from its solar Focus. 1837 C. R. Goring & A. Pritchard Micrographia 56 The solar focus of its eye-glass. < as lemmas |
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