初出茅庐 - Babe in the woods

She is a good driver, but as a mechanic, she is just a babe in the woods.
-她是一个好驾驶，但是她只是个初出茅庐的修车技工。


He was a babe in the woods regarding politics.
-对于政治他可是初出茅庐，没有经验。


She knew nothing of what went on behind the scenes. She was a real babe in the woods.
-她真是个初出茅庐的丫头，对于实际情况毫不知情。


---《流行英语成语》