这座城市在市中心禁止汽车通行，这让街道安静了很多。
The city banned cars from the city centre, which made the streets much quieter.
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Which英 /wɪtʃ/|美 /wɪtʃ/
解释
which 指代前面整句话'汽车禁行政策'，引导非限制性定语从句，说明该事件带来的结果。
The city banned cars from the city centre, which made the streets much quieter.
which 指代前面整句话'汽车禁行政策'，引导非限制性定语从句，说明该事件带来的结果。