研究发现：（1）是否享受税收优惠对主营业务利润率、资产净利率和资产负债率有显著影响；

The research discovers that:(1) Whether enjoy the tax preference has the obvious influence to main camp service profit margin, property net profit rate and property ratio of debt.

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不过，该业务的营业利润率只有5%。

But operating margins in that business are just 5%.

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布林的主营业务是通过Instant Search以及构建通讯新业务来提升利润率。

Brin focuses on raising margins with Instant Search and building new businesses in communications.

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