用的是-webkit-私有属性。
text-overflow: -o-ellipsis-lastline;
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
https://blog.csdn.net/cyj_sky/article/details/52787050
https://www.cnblogs.com/zpsong/p/5406494.html