参考资料：https://www.ruanyifeng.com/blog/2015/07/flex-grammar.html
需求1：子元素实现从右到左排列(或者从下到上排列)
dicContainer: {
display: flex;
flex-direction: row-reverse;
}
// 延申：
// 1.写在contaniner有6个属性：3个flex-，2个align-，1个justify-content
// 2.flex-direction: row(默认) | row-reverse | column | column-revers
// 3.flex-direction: row-reverse与justify-content: flex-end的区别
// flex-direction: row-reverse坐标轴反转，123 -> 321排列
// justify-content: flex-end坐标轴不反转，123 -> 123排列