Although solar cells had now penetrated numerous niche markets, the cost of making them still priced them out of the market for grid-connected electricity.
尽管太阳能电池现在已经找到了一大块安身的市场，其生产成本仍然限制着它打进使用电网的市场。
This happened because foreign car companies successfully penetrated the American market, and they did so with smaller cars.
这是因为外国汽车公司成功地通过小型汽车打进美国市场。
We still need to know how large this consumer market was and how far down the social scale the consumer demand for luxury goods penetrated.
我们仍然需要知道这种消费市场到底有多大，以及消费者对奢侈商品的需求向下渗透到社会的什么层次。
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