她在绘画上只是个业余爱好者，偶尔画画但从不深入学习技巧。

She's just a ___dilettante in painting, dabbling occasionally but never mastering the techniques.

他对摄影只是浅尝辄止，完全是个业余爱好者。

He's just a ___dilettante in photography, never really committing to it.