1.because of 因為；由于

It is mainly because of my fault.
這主要是由于我的過錯。

His business went under because of competition from the large corporations.
由于大公司的競爭，他的生意陷入了困境。

2.dwell on 詳述；細想

A great number of water fowls dwell on the island.
許多水鳥在島上棲息。

The majority of people do not live in the present. They either dwell on their past or daydream about the future.
大多數人都不能做到這一點，他們不是沉浸在過去的回憶中，就是整天幻想著自己的未來。

3.play with 同…一起玩；玩弄

Please play with me at playtime.
請在娛樂時間和我玩。

Go play with your friends.
去和你的朋友一起玩吧。