1、 By 1920, the rules mandating three hits per side and back - row attacks were instituted.
到1920年, 每边击球不得超过三次和后排进攻的规则设立.
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2、 By the Fall of 1994, eleven states had statutes mandating the admissibility of DNA evidence.
到1994年秋季, 11个州通过法令要求在法庭上采纳DNA证据.
来源:互联网
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