许多人害怕健身房，因为他们感到失落，而且不想让自己难堪。
Many people fear the gym because they feel lost and don't want to embarrass themselves.
孩子们离家后许多父母都会有失落感。
Many parents feel a sense of loss when their children leave home.
从积极生活退出来的许多人会感觉到失落。
Many people who retire from an active life feel themselves at a loss.
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