人们的寿命越来越长，需求越来越复杂。
首先，人们的寿命越来越长，需求越来越复杂。
First, people are living longer with a lot more complex needs.
这一数字还在增长，因为人们的寿命越来越长。
The number has been increasing because people are living longer.
这一数字还在增长，因为人们的寿命越来越长。
The number has been increasing because people are living longer.
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