It's difficult for me to be casual about anything. [+ about]

要我轻松处事很难。

He's an easy-going, friendly young man with a casual sort of attitude towards money.

他是个随和、友善的年轻人，不太在意金钱。

What you mean as a casual remark could be misinterpreted.

你随便说的一句话，可能就被曲解了。

Even a casual observer could hardly have failed to notice the heightening of an already tense atmosphere.

即便是不经意的旁观者也一定已经觉察到本就紧张的气氛进一步加剧了。

I also bought some casual clothes for the weekend.

我还买了些周末穿的休闲装。

...establishments which employ people on a casual basis, such as pubs and restaurants.

酒吧、饭店等雇用临时工的地方

It became increasingly expensive to hire casual workers.

雇用临时工越来越贵了。