They are skimming, scanning, reading for detail,intensive and extensive reading.
It means if you are a sub, your substiuting.
under a foundation of a sub.
Sub means smaller or under.
"Sub" in Spanish can have different meanings depending on the context. It can mean "under," "below," "beneath," or "since."
it mean to do something that starts with a sub
sub-sited
sub-tribe
a sub point is detail to back up your main point for examplelets say i wanted to write a paper about myselfmy main point : first i would like to start off with my childhood....sub point: in my early childhood i would always cry for my grandma.....
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detail out
In great detail.