Two different compounds are available to each team at every Grand Prix weekend, and every driver must make use of both specifications during the race.
在周末的大奖赛中，各车队可以准备两套不同的轮胎，车手在比赛中两套轮胎都必须要用到。
Because the W3C specifications leave quite a bit of room on how to implement plugin content, two different object implementations have emerged over time.
因为W3C规范给如何实现插件内容留了相当大的空间，结果出现了两种不同的object实现方式。
The two specifications address different needs, though obviously share some commonality. In the words of the Web Forms specification
这两种规范针对不同的需求，虽然存在明显的共同之处。
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