Four-dimensional issues

Question about four-dimensional: why can't humans imagine four-dimensional space?

Https://www.zhihu.com/question/40217873/answer/91882011? Group_id = 701375890050789376

Reference

I really want to know what a high-dimensional space is like.

What does physics mean by collapsing a high-dimensional scale into a small scale?

There is also a space where the planar ternary equation can be used as a space.

How do I use ry to represent a multivariate equation?

Some people say that the human brain has a three-dimensional structure and cannot imagine a four-dimensional structure. what is the relationship? Cannot understand

Is there anything in life that reflects high dimensions?

I said:

Reference

0. teaching is linear (books are one-dimensional characters, teachers' lectures are one-dimensional, and articles are one-dimensional)

1. low human IQ (junior high school teaching can only teach two-dimensional)

2. I have not learned enough (a lot of thinking exercises, digitization, and abstraction during high school) (the landlord left behind here)

3. knowledge is monopolized (the high numbers of university studies can simply consider three-dimensional equations with equation transformations, and the linear numbers can push up the dimension of the equations infinitely );

Let's look at the code ..............

Basically, how do I take over such code?

$goods = M("SightGoods")->field('id')->where(array('sight_id'=>$id))->select();        if($goods){            $ids = array();            foreach ($goods as $v) {                $ids[] = $v['id'];            }            if(count($ids) > 0){                $orderWhere['gid'] = array('in',$ids);                $orderWhere['comment_status'] = 2;                $orderWhere['goods_type'] = 'sight';                $orders = D('SightOrderView')->field('id')->where($orderWhere)->select();                if($orders){                    $oids = array();                    foreach ($orders as $v) {                        $oids[] = $v['id'];                    }                    if(count($oids) > 0){                        $page = $page-1;                        $pageCount = 10;                        $limit = $page*$pageCount.",".$pageCount;                        $comment = M('OrdersComment')->where(array('oid'=>array('in',$oids)))->limit($limit)->order('create_time DESC')->select();                        if($comment){                            foreach ($comment as &$v) {                                $user = M('Users')->field('mobile,openid,nickname,email,img,sex,ind_signature')->find($v['uid']);$user['img'] = $this->eve->arrangeUserImgPath($user['img']);                                $v['user'] = $user;                                $imgs = M('UserAlbum')->field('image_path')->where(array('obj_id'=>$v['id'],'image_type'=>1))->select();                                $images = array();                                if($imgs){                                    foreach ($imgs as $img) {                                        $images[] = $this->eve->arrangeUserImgPath($img['image_path']);                                    }                                }                                $v['images'] = $images;                            }                            $this->apiRetrun(1,'ok',$comment);                        }                    }                }            }        }$this->apiRetrun(0,'no data');    }

This is a natural manifestation of a typical multi-dimensional approach to human thinking.

What I want to talk about is that programmers should use the maintenance training to explain