旅途，语言，和时区差异都是需要被解决的难题。

Travel, language, and time zone differences are all issues that must be addressed.

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安全公司称网络犯罪很难制止，因为它可能跨越大洲和时区。

Security firms say Internet crime can be hard to combat because it embraces different continents and time zones.

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例如，History服务支持通过传入地区和时区进行本地化。

For example, the History service supports localization by passing in a locale and a time zone.

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And basically other interesting activities we did, weather studies, and time zone studies, which is part of the geography, and lots and lots of information.

还有其他一些有意思的活动，气候研究和时区研究，这是地理课上学的，还有很多很多其他信息。

麻省理工公开课 - 媒体、教育、市场课程节选