| 单词 | 正球 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔aplanatic〕Of or relating to optical systems that correct for spherical aberration.等光程的，透镜消球差的：矫正球面像差的光学系统或与之有关的美国传统〔spherical〕The earth is not perfectly spherical.地球不是个正球体。剑桥高阶〔strike〕A pitched ball that is counted against the batter, typically one that is swung at and missed, fouled off, or judged to have passed through the strike zone.好球，正球：对击球员不利的投球，典型的这种球为没有击中，击球出界或被认为已经过了好球区美国传统 |
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