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法律规定，行车必须遵守速度限制。
The law lays down that speed limits must be obeyed.
youdao
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实行速度限制容易，而迫使司机遵守较难。
Imposing speed restrictions is easy, but forcing drivers to observe them is trickier.
《柯林斯英汉双解大词典》
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实行速度限制容易，而迫使司机遵守较难。
Imposing speed restrictions is easy, but forcing drivers to observe them is trickier.
《柯林斯英汉双解大词典》