When you decide to become a front-end consumer-oriented service, you really need to be better than your competition.

当作为前端客户导向型的服务提供商时，就需要做得比竞争者更好。

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You have a front coming here.

这是个前端。

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In this case the promoter, which is a sequence of DNA that is positioned right in front of the gene of interest, the promoter is the betagalactoglobulin promoter in this case, and betagalactoglobulin is a milk protein.

这里涉及到的启动子,也是一段DNA序列,它必须刚好位于目的基因序列前端,我们用到的是β-乳球蛋白启动子,β-乳球蛋白是乳汁中的一种蛋白

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