artless

她稚嫩的绘画技巧显示出缺乏艺术训练。

Her ___artless painting revealed a lack of artistic training.

孩子天真无邪的笑容总能温暖人心。

The child's ___artless smile always warms people's hearts.

她坦诚地承认自己在这个领域毫无经验，反而让面试小组感到意外和欣赏。

Her ___artless admission that she had no experience in the field surprised and charmed the hiring panel.