例子：
1.興趣;關注;愛好
I developed an interest in the machine.
我對這機器發生了興趣.
I have lost my interest in chemistry.
我對化學已不感興趣.
2. 趣味性(+to)
Local color added interest to the novel.
地方色彩增加了這部小說的吸引力.
3. 感興趣的事物或人（這是就可數）
His two great interests in life are music and painting.