最直接的挑战就是，Google Books的深度搜索和更好的相关度排序，这些通常比我们在用的图书馆联机目录要好，而且它总是会有结果返回。
The immediate challenge is that Google Books' deeper indexing and more advanced relevancy ranking usually works better than that of our local catalogs-and it always returns results.
基于纸张的脱机事务，没有和联机事务一样的对客户的直接反馈。
Offline paper-based transactions where there is no immediate feedback to customers, as there is with online transactions.
如上所述，然而，在B2B领域的转换是很少直接或联机。
As noted above, however, conversion in the B2B realm is rarely immediate or online.
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