Only just giddy, and harum-scarum, you know.

他只不过还是个毛头孩子。

youdao

My son does his homework harum - scarum, and that is why his schoolwork is so poor.

我儿子做家庭作业总是粗心大意， ， 他功课不好的原因就在这里。

youdao

Just yesterday it seems you were a harum-scarum child with dirty hands and a willful heart.

就在昨天，你还象个冒失的傻孩子，一双手脏呼呼的，一颗心顽固任性。

youdao

Early in his presidency, John Kennedy exhibited a slipshod, undisciplined, harum-scarum approach to foreign and defense policy.

FORBES: Fact and Comment