TASK DEFINITION: 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.
PROBLEM: The name is because radioactive material " falls out " of the atmosphere into which it is spread during the explosion .

SOLUTION: Nuclear fallout , or fallout , is the residual radioactive material propelled into the upper atmosphere following a nuclear blast , so called because it " falls out " of the sky after the explosion and the shock wave have passed .

PROBLEM: The most important is the Constitution of the Commonwealth of Australia .

SOLUTION: The most important is the Constitution of the Commonwealth of Australia , which is referred to as the " Constitution " in the remainder of this article .

PROBLEM: An annular hurricane is a rare type of hurricane that has a big , circular eyewall , and thick , deep convection around it with no spiral rainbands .

SOLUTION:
An annular tropical cyclone is a tropical cyclone that features a normal to large , symmetric eye surrounded by a thick and uniform ring of intense convection , often having a relative lack of discrete rainbands , and bearing a symmetric appearance in general .