“Scientific models are often used in laboratories to represent Earth's processes. While field tests and observations are vital, physical, digital, and mathematical models are useful tools in the laboratory. Models provide insight into complex processes that might otherwise be difficult to grasp”
girl's periods get more regular, cramps are more likely.They can be mildly annoying to extremely painful, and they usually last for a few days. Cramps may worry some girls at first if they don't know they're often a normal part of having a monthly period.<span>
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Yeah man i feel u i have been told that many times but i can guarantee you mean the world to many people dont feel down
