动词 “appreciate” 承载了多种含义。在表示 “重视”、“感谢” 或 “完全理解” 时，它作为及物动词存在；而当它表示 “涨价，增值” 时，则是不及物动词。观看视频中主持人 Roy 的讲解，以了解这一多义词的四个常见用法。

1. 作为及物动词，“appreciate” 表示 “重视，赏识，欣赏（人或事）”，强调此人或事的重要性或独特性。例如：

I appreciate Luciana. She's amazing.

I really appreciate art. It enriches my life.

2. 同样作为及物动词，“appreciate” 可表示 “感谢，感激他人所做的事情”。例如：

I really appreciate you organising the party.

Could you please talk to her for me? I'd appreciate it.

3. 当“appreciate” 用作不及物动词时，它表示 “涨价，增值”。例如：

The value of my investment appreciated by 20% over the last five years.

It is predicted that home prices in the area will continue to appreciate in the coming years.

4. 当“appreciate” 用作及物动词时，它还可以表示 “完全理解，意识到情况的重要性”。例如：

I don't think you appreciate how serious the situation is.

We appreciate that you are unhappy with the product. However, we still need you to return it before we can process your refund.