1. In some cases, the symptoms can be mild and barely noticeable.
在一些情况下，症状可能很轻微，几乎察觉不到。

2. The lawyer presented several cases to support his argument.
律师提出了几个案例来支持他的论点。

3. Please handle the fragile items with care; they are packed in special cases.
请小心处理易碎物品，它们被包装在专用箱子里。