The phrase "time span that" is correct and can be used in written English.
You can use it to refer to the time period that something has taken place, is taking place, or will take place. For example: "The archaeological dig uncovered artifacts from a time span that dates back to the 2nd century."
The rule says that an epidemic is over if no new cases occur in a time span that is double the longest known incubation period of the disease.
Chosen time spans are representative for any time span that might be chosen in the future.
NMFS is now preparing a new permit to allow continued drift gillnet fishing without sufficient sperm whale protections, and is justifying its action by manipulating its own bycatch data using a time span that makes the annual bycatch average appear smaller.
Possibly this difference is related to the short pregnancy time span that may condition the inflammatory process in the mouse as compared to human pregnancy.
Our real-time PCR analysis revealed that the expression levels of SOIG mRNA in the olfactory epithelium of lacustrine sockeye salmon increase from March to June, a time span that includes the period before and during PST.
Particles that jump from one corral to the next helped us to determine that particle bleaching was minimal under our recording configuration (100 ms illumination, 20% laser power equivalent to 1.2 mW*s−1*µm−1) because particles maintained the same value of maximal fluorescence over a time span that includes multiple approaches to the PM.
I think the problem is that so much of what we do necessarily is about tomorrow, and in fact about time spans that are much longer than tomorrow.
In general, the temporal and spatial variability of many watershed-scale characteristics, such as annual sediment loads, makes it very difficult to detect changes within time spans that are useful for land managers or conducive to adaptive management.
Taoist arts represents the diverse regions, dialects, and time spans that are commonly associated with Taoism.
However, these detailed spatially-resolved simulations can often only yield short simulation time spans that may not be of any interest to the experimentalists.
Hence, such detailed simulations can often only yield short simulation time spans that may not be of interest to the experimentalists.
