The images that survive in this part of the world span at least 20,000 years.

在这个地区保存下来的图像至少有2万年的历史。

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The life span of the data saved to a session is, at most, from the moment the user accesses a domain to the moment when a user times out after a preset amount of time of inactivity.

保存在会话中的数据的生命期，最长是从用户访问域的那一刻到用户在预设的一段不活动时间之后超时的那一刻。

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For example, notice that the period at the end of the first paragraph is marked as style T4, while the period in the final paragraph is outside any span.

比方说，请注意第一段后面的句点被标记为样式t4，而最后一段中的句点则在任何样式作用范围之外。

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Those trailers, in turn, can only cross from New Jersey to Staten Island by completely closing the westbound lanes of the Goethals Bridge, moving one at a time over the span at a maximum speed of 5 mph, Ms. Burtis said.

WSJ: Bathrooms' Long Trek to Replace Sandy-Wrecked Facilities

The benefits for high-income taxpayers are for the most part loaded onto the back end of the law's ten-year span, and at the end of that period the whole thing vanishes in a puff of smoke.

FORBES: Mad Tax Party

Investigators need to find out what happened at the I-5 span 60 miles north of Seattle and if it could be repeated at similar bridges around the country, Debbie Hersman said Saturday.

NPR: NTSB Says Wash. Bridge Collapse Is Wake-Up Call