In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Q: During this time , it has passed overhead once and underfoot once , so in many places the period of strongest tidal forcing is the above-mentioned , about 12 hours and 25 minutes .

A: During this time , it has passed overhead ( culmination ) once and underfoot once ( at an hour angle of 00:00 and 12:00 respectively ) , so in many places the period of strongest tidal forcing is the above-mentioned , about 12 hours and 25 minutes .
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Q: From the Middle Jurassic of Argentina , it was one of the earliest large South American theropods .

A: It was among the earliest large South American theropods , having been found in Middle Jurassic strata of the Can ̃ ado ́ n Asfalto Formation in the Can ̃ ado ́ n Asfalto Basin of Argentina .
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Q: In certain cases when it is important to understand information very quickly , the visual system may drop the colors , and only work in shades of gray .

A:
When the need to process visual information as rapidly as possible arises , for example in an emergency situation , the visual system may operate only in shades of gray , with the extra information load in adding color being dropped .
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