importent question
ارسال شده: پنجشنبه ۱۳۹۳/۷/۱۰ - ۱۶:۲۶
why we use s at the end of the name of some branches of scince like physics[/color] or mathematics but we dont use for some others like biology or Chemistry؟
raha.72 نوشته شده:why we use s at the end of the name of some branches of scince like physics[/color] or mathematics but we dont use for some others like biology or Chemistry؟