How to end a line of text with ellipsis in CSS?

For a first line of text:

.truncate {
width: 250px;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis; }

For a forth line of text:

.line-clamp {
display: -webkit-box;
-webkit-line-clamp: 4;
-webkit-box-orient: vertical; overflow: hidden;
}