Jack always has his head in the clouds.That's why he is still there. 杰克总是不切实际.这就是他一直停滞不前的原因.Amy wants to buy a car for $500 dollars. She has her head in the clouds. The car is much more expensive than that. 艾米想花500美元买辆车,她头脑一定不清楚,一辆车的价钱当然不止500美元.