Members of the choir blended their voices in perfect harmony.合唱团的成员十分和谐地将他们的声音融合在一起。

harness vt.利用（河流、瀑布等）产生动力；利用

People have harnessed the sun's energy since ancient times.从远古时代起，人类便一直在利用太阳的能量。

harsh adj.①粗糙的；刺耳的，刻薄的②严厉的；严酷的，恶劣的

The sweater is not comfortable because the material is too harsh.这件毛衣穿着不舒服，因为它的材料太粗糙了。

Dissenters were usually severely punished under the emperor's harsh rule.在国王严酷的统治下，异见者们通常会受到严厉的惩罚。

hazard n.危险；危害物 危险的，冒险的

A high incidence of lung disease is one of the known hazards of smoking.肺病的高发病率是已知的吸烟的危害之一。

heal vt.康复，治愈vi.愈合

The wound soon healed under the care of the nurse.在护士的护理下，伤口很快便愈合了。

heap n.堆；大量，许多

Don’t leave your dirty laundry in a heap in the middle of the floor!别把你的脏衣服成堆地放在地板中间！

The miser heaped up great wealth.那个守财奴积累广巨大的财富。

hint n.提示，线索

Mary gave Bill a hint about his birthday present to let him guess.关于比尔的生日礼物，玛丽给了他一个线索让他猜。

historic adj.历史上著名的；有历史意义的

During her summer vacation, Janet visited some places of historic interest in China，such as the Imperial Palace and the Summer Palace.在暑假期间，珍妮特参观了中国的许多历史古迹，例如故宫和颐和园。

horizon n.地平线；眼界，视野

People once believed that the length of the earth ended at the ocean’s horizon.人们曾经相信，海平线便是大地的尽头。

host n.主人；节目主持人

The host asked his guests to come to the table for dinner.主人邀请客人们到餐桌用餐。

Janet always hosts guests at their house,while John only sits there and eats.珍妮特精彩在家里招待客人，二约翰却只会坐在那里吃东西。