“fixed-focus lens”的概念、定义、翻译、参考文献-科学参考

单词	fixed-focus lens
释义	fixed-focus lens [`fikst ´fō·kǝs `lenz] ^OPTICS A lens whose focus is invariable, as on inexpensive cameras with no mechanism for adjusting focus but so designed that all objects from a few feet away to infinity are tolerably in focus.
随便看	evening gun evening star evening twilight even keel even number even-odd nucleus even parity check even permutation even pitch event event-driven monitor event horizon Eventognathi event recorder event-related potential event tree even-word boundary Everett's interpolation formula everglade evergreen Evershed effect Eve's constant Evjen method evjite evoked potential

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