1. Their justification: some 50 percent of all marriages in the United States end up on the trash heap.
    他们的理由是：在美国，50%的婚姻最终将被扔进垃圾堆。

2. In the young there is a justification for this feeling.
    青年们有这种感觉是情有可原的.

3. In the young there is a justification for this feeling.
    青年人有这种感觉是情有可原的。