Hayley教口語，“胡思亂想”用英語怎么說？

“Head in the clouds”腦袋在云里，可以用來形容想法飄飄然，不切實際，所以正確意思是“胡思亂想，思想開小差”，其反義詞就是：have one's feet on the ground; be down-to-earth(腳踏實地)。

Jack always has his head in the clouds. That's why he is still there.

杰克總是不切實際。這就是他一直停滯不前的原因。

Rather than having his head in the clouds, he needs to be more pragmatic.

他還是不要再白日做夢了，應該更加實際一點。