She represented authority just because of the way she looked and spoke.她代表权威只不过是因为她的长相和谈吐。

I bought the flowers just because I felt like it.我买这些花只是因为我想买。

You don't have to feel obliged to do things just because others expect you to.即使别人希望你做, 你也不必觉得非做不可。