rects.push_back(mr);这句话是什么意思？

Question

vector<vector<Point> >::iterator itc= contours.begin();
vector<RotatedRect> rects;

//Remove patch that are no inside limits of aspect ratio and area.  
while (itc!=contours.end()) {
//Create bounding rect of object
RotatedRect mr= minAreaRect(Mat(*itc));
if( !verifySizes(mr)){
itc= contours.erase(itc);
}else{
++itc;
rects.push_back(mr);
}
}

Answer 1

vector<RotatedRect> rects;它是一个vector对象啊，调用vector对象的push_back方法。