如果没有广告，我们就不知道有什么好买的。
We wouldn't know what there was to buy if we didn't have advertisements.
如果没有广告，生产者就可能难以销售他们的产品。
Without advertisements, manufacturers may find it difficult to sell their products.
如果没有广告，消费者就没法知道附近商店商品的情况。
If there were no advertising, consumers could not know about goods in their nearby shops.
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