hack up +
猛烈地咳嗽而把喉嚨或肺部裡的痰等物咳出來
We frequently hacked up a lot of phlegm while we were ill. (我們生病時往往會咳出許多痰)
The cat was hacking up a hairball. (那隻貓咳出一團毛球)
hack * up +
(用刀或其他尖銳工具將某物) 砍、劈或剁成碎片、碎塊
He hacked the table up and burnt it. (他把桌子劈成碎片後將它燒掉)
The killer had hacked up the body. (兇手將屍體剁成碎塊)
head * off +
防止，阻止 (不好的情況發生)
The company is giving employees large raises to head off a strike. (公司將給員工大幅加薪以防罷工)
head * off +
迫使…改變方向
The father tried to head the dog off by running towards it. (這位父親朝著狗跑去，試圖把牠趕走)
head off
出發；離開
What time are you heading off? (你什麼時候出發？)
After work, we all headed off to clubs. (下班後我們全都去了夜店)
hear about +
得知，獲悉
Did you hear about Tom’s birthday party? (你知道湯姆舉辦生日派對的事嗎？)
hear * out
聽 (某人) 說完
At least hear him out before making up our mind. (我們作決定之前至少先聽他說完)
I heard John out before I commented. (我在評論之前先聽約翰把話說完)
hem * in +
包圍，堵住 (某人)；限制，約束 (某人)
A truck hemmed me in. (一部卡車擋住了我的去路)
Don’t hem in your child with too many restrictions. (別給你的小孩太多的限制)
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