面向消费者的网络直销公司看上去尤为脆弱，它们其中有19%的公司价值现在不比其资产负债表上的现金额多多少。
B2C companies look particularly vulnerable with 19 per cent of them now worth little more than the cash on their balance sheets.
取决于表的大小和网络的传输情况，查询性能可能会很糟糕。
Depending on the size of the table and network traffic, query performance could suffer.
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