1. Hit somebody a hard blow 狠狠地打某人
She hit him a hard blow. 她狠狠地打了他一拳。
2. hit the road 出发、离开
You had better hit the road if you want to be there before it's dark.
Everything is set now. Let's hit the road.
3. hit the spot 使人满意，正合需要（原意是射中靶心，射中者对自己的射击技术非常满意。现在，hit the spot通常是指食物或饮品尤其令人满意。）
Pepsi Cola hits the spot, 12 full ounces, that's a lot.
My mother is very good at cooking. Her dishes always hit the spot.
4. hit bottom 到了*低点
If the price of shares of a stock hits bottom, that might be the time to buy it. Its value can only go up.
5. hit the books 看书，学习
The final examination is coming. I have to hit the books.
6. hit the ceiling 勃然大怒
Girls tend to hit the ceiling when their boyfriends keep staring straightly at other birds.
A wife may hit the ceiling because her husband forgot their wedding anniversary.
7. hit the nail on the head 说得中肯，一针见血；解释正确
His remarks always hit the nail on the head.
Your analysis really hit the nail on the head.
8. hit the hay 上床睡觉
Toutou, it's time for you to hit the hay.