求翻译：10．便利市场（代码851）：要谨慎使用15 - 16个小时的工作时间，除非有一种方法，以确保市场不会成为24小时运作。此外，不管他们是否已经或将有，加油站是一个考虑因素。是什么意思？

10. Convenience market (code 851): be careful to use 15 - 16 hours of working time, unless there is a way to ensure that the market does not become 24-hour operation. In addition, regardless of whether they have or will have, gas stations is a factor.

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10. facilitates the market (code 851): Must use discretely for 15 - 16 hours the operating times, only if has one method, guarantees the market not to be able to become 24 hours operations.In addition, no matter whether will they already or have, the gas station will be a consideration factor.

10. Facilitating market (code 851): be careful using 15-16 hours of working time, unless there is a way to ensure that the market will not be operating 24 hours. In addition, regardless of whether they have or will have, gas stations are a concern.

10.Convenient market (code 851): Should use the working time of 15-16 hours prudently, unless there is a method, so as to ensure the market will not become 24-hour operation. In addition, no matter whether they have already or had, the service station is a consideration.