He stepped in front of the kid and laid down the rules.
他上前一步，走到那哥们的面前，讲出了规则。
The committee laid down rules about the size of tennis courts.
委员会制定了关于网球场面积的规则。
Competitor must observe the rules laid down by Racing Committee.
赛员必须遵守比赛规则。
Competitor must observe the rules laid down by Racing Committee.
赛员必须遵守比赛规则。
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