New words：

ordinary [ˈɔːrdneri] adj. 普通的；平常的；一般的；平凡的
out of the ordinary 不平常的

Sample Sentences：

His poems are quite ordinary.
The novel describes the way of life of the ordinary people there.
I'm just an ordinary businessman, trying to earn an honest penny.
Has anything out of the ordinary happened since I've been away?

New words：

spring [spriŋ]
v.跳；跃；蹦；突然猛烈地移动
n.春天；弹簧；发条；跳

sprang [spræŋ] 过去式
sprung [sprʌŋ] 过去分词

Sample Sentences：

There's little spring in this sofa.
The cat made a spring at the mouse.

The dog tried to spring over the gate.
Suddenly a rabbit sprang out of its cave.
He turned off the alarm and sprang out of bed.

New words：

drift [drift]
v.漂移；漂流；飘；缓缓移动
n.趋势；漂流；趋势

iceberg ['aisbə:g] n. 冰山

Sample Sentences：

Clouds drifted across the sky.
I'm sorry, I got bored and drifted off.
There was a drift of smoke above the trees.
Most of the iceberg is under the water.
The Titanic sank after hitting an iceberg in the early morning hours of April 15, 1912.

New words：

endanger [in'deindʒə] v. 危害；使遭危险；危及
endangered [in'deindʒəd] adj. 濒临灭绝的

Sample Sentences：

You will endanger your health if you smoke.
We should do our best to save endangered species.
The drift of the icebergs in the sea endangers the ships.
That one mistake seriously endangered the future of the company.

iceberg ['aisbə:g] n. 冰山

New words：

species ['spi:ʃi:z] n. 种；物种；种类

Sample Sentences：

There are several species of zebra.
This species of bird now exists only in Africa.
This rare bird has become an endangered species.

endanger [in'deindʒə] v. 危害；使遭危险；危及
endangered [in'deindʒəd] adj. 濒临灭绝的