The first and most important area to consider is the level of protection offered by the helmet, followed by the comfort factor.

首先也是最重要的领域要考虑的是所提供的保护头盔的水平，随后由舒适的因素。

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In choosing transport for a business trip, comfort is a very important factor to consider.

出差选择交通工具时，舒适度是一个需要考虑的重要因素。

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The comfort and convenience of shopping centers is another factor which makes them popular with customers.

购物中心舒适而且方便，这是超市受人欢迎的另外一个原因。

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You don't really look forward to a flight these days for one reason or another and its usually to do with the comfort factor.

CNN: Pay-as-you-weigh airfares the 'next step'

Compared with a six-inch stilt, their comfort factor can't be beat.

WSJ: The New Heels: Sweet and Low-Down

The research shows clearly that the comfort factor of broadband comes from not having to worry about cost, reliability or being knocked off the net in the middle of something.

BBC: What is broadband for?