然而，OTA的用户转化率水平在2009年呈现了整体的上升趋势。
However, OTA conversion levels show a general upward trend in 2009.
实例之一是服务或软件首先提供免费试用，然后将免费用户转化为支付费用的顾客。
The first instance is the service or software that offers a free trial and then converts users into paying customers.
将在线用户转化为在线购买者这一方面，旅游供应商和OTA的能力各不相同。
Travel suppliers and OTAs display a wide range in their ability to convert their online shoppers to purchasers.
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