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//一行

  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  word-break: break-all;

//两行

text-overflow: -o-ellipsis-lastline;
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2;
line-clamp: 2;
-webkit-box-orient: vertical;