* ngFor从底部开始创建html元素

I want to create something like a trello board. For that I wrote 2 columns with style as width = 20% and display = inline block. In one column I have used *ngFor for printing dynamic elements and in other column i have written <mat-list-item></mat-list-item> for multiple cards. Please find the code and screenshot below.enter image description here

And Please find the code from app.component.ts as below. enter image description here

我的问题是我不明白为什么* ngFor代码最初会跳过几个空格,然后开始在底部打印内部代码以匹配第二列中的静态数据。请参阅屏幕截图1以获得更好的理解。预先谢谢您。(我使用了最新版的角钢和角钢)