1799.harmful(形)有害的
Smoking can be harmful to your health.
吸烟对身体有害。

1800.harvest(名)收获
The rain of tears is necessary to the harvest of learning.
要获得丰富的知识，就必须用泪雨浇灌。

1801.haste(名)匆忙
It was obvious that the letter had been written in his haste.
这封信显然是他匆忙写成的。

1802.hasten(动)催促；急忙
The deathbed struggles of the enemies can only hasten their own doom.
敌人的垂死挣扎只能加速他们的灭亡。

1803.hat(名)帽子
Square your hat away!
把帽子戴正！

1804.hate(动)(名)讨厌、憎恨
(动):The kindhearted people hate violence.
善良的人们憎恨暴力。
(名):He looked at me with hate in his eyes.
他用憎恨的眼神看着我。

1805.have(动)有
不规则变化had, had
This coat has no pockets.
这件衣服没有口袋。

1806.head(名)头
He had a good head for business.
他很有商业头脑。

1807.headache(名)头痛
Paying the bills is a constant headache.
账单付个没完，真叫人头痛。

1808.heading(名)标题
What heading does the subject on the common share of information resources come under?
关于资讯资源分享的内容要放在哪个标题下面。

1809.headline(名)报纸的标题
The headline in the newspaper stands out well.
报纸的标题十分醒目。

1810.headphone(名)耳机
Jack is wearing a headphone to listen to music.
杰克带着耳机听音乐。

1811.health(名)健康
Health is more important to most people than money.
对大多数人来说健康比金钱更重要。

1812. healthful(形)有益健康的
The healthful man can give counsel to the sick.
健康的人可以对生病的人提出忠告。

1813.healthy(形)健康的
反义词unhealthy
The twins look very healthy.
这对双胞胎看起来非常健康。

1814.hear(动)听到
不规则变化heard, heard
We must hear opinions contrary to ours.
我们必须听取反对的意见。

1815.hearing(名)听力
His hearing was impaired by the continuous great noise for a long period of time.
长时期的巨大噪音使他的听力受到了损害。

1816.heart(名)心
I loved my sister, I had not the heart to deny her anything.
我爱我的妹妹，所以不忍心拒绝她的任何要求。

1817.heat(名)热、热度(动)加热
(名):What is the heat of the water in the swimming pool?
游泳池的水冷热如何?
(动):The heater heats the room.
暖气使房间暖和。

1818.heater(名)暖气机、暖气设备
Once installed, this heater operates automatically.
一旦安装好以后，这加热器就会自动地运行。

1819.heaven(名)天堂、极乐之地
反义词hell
May her soul rest in Heaven.
但愿她的灵魂在天国安息。

1820.heavier(形)较重的
This load is heavier than that one.
这个担子比那个更重。

1821.heavily(副)大量地
It was raining heavily and they found that a stream had formed in the field.
雨下得很大，他们发现田罗已形成一条小溪。

1822.heavy(形)重的、沉重的
反义词light
China is a giant awakening from a heavy sleep.
中国是一个从沉睡中觉醒的巨人。

1823.heel(名)脚跟
There's a hole in the heel of my stocking.
我袜子后跟有一个洞。

1824.hell(名)地狱
反义词heaven
The road to hell is paved with good intentions.
通往地狱之路以善意铺成。

1825.hello(感)哈罗啰
Hello, who's speaking, Please?
喂，请问您是谁啊？

1826.helmet(名)安全帽、头盔
The man on the motorcycle wore a helmet.
骑摩托车的人戴了一顶安全帽。

1827.help(动)帮忙(名)帮手
(动):She helped him choose some new clothes.
她帮他选了一些新衣服。
(名):I am a good help to my mother.
我是我妈的好帮于。

1828.helpful(形)有用的
反义词helpless
It's helpful to be well informed.
消息灵通总是有益的。

1829.helpless(形)无助的、无用的
The rain is coming into my house and I am helpless.
雨水进了我的房间，我一点办法也没有。

1830.here(副)这里
This book here is very helpful to me.
这本书对我来说很有帮助。

1831.hero(名)英雄
The football player was Paul's hero when he was at school.
保罗还在学校的时候，这个足球运动员就是他崇拜的英雄。