remind sb. to do sth. 提醒某人做某事。如：

I reminded him to come back before dark.

拓展: remind sb. of sth. 使某人回想起某事。如：

The lovely Mickey Mouse doesn't remind people of the unfavour-able images of mice and rats.

可爱的米老鼠并没有让人们想起老鼠那不好的形象。

3.It's three times as big as underwater.

水下部分是水上部分的三倍。

该句为as...as句型，as big as underwater 后面省略了as that above water.

该句three times 为状语，修饰as...as句型。比较句型中的状语要放在第一个as或比较级之前。如：

This box is twice as big as that one.

The ship can run three times faster than small boat.

误区警示：不要受汉语干扰而把"大三倍"说成bigger three times.

4. There are fantastic shows every two hours.

"every+基数词+复数名词"，表示"每......，每隔......"。 如：

I go there every three days. 我每隔两天就去那里一趟。

He stopped and turned round every few meters. 每隔几米他就停下来回头看看。

拓展: 我们还可以用"every+序数词+单数名词"来表达同样的意思。

Every four years=every fourth year 每四年，每隔三年

every two days=every other/second day 每两天，每隔一天

5.辨析：energy , power , strength 与force

（1）energy 主要指人的精力，自然界的力、能源等。如：

Old though he is, he still has much energy to work 12 hours a day. Electrical energy raises and lowers elevators.

（2）power 主要指做一件事所依靠的能力、功能、人或机器等事物潜在的或所能发挥出来的力量、职权、权力或政权。如：

Water power creates electric power. 水力能产生电力。

（3）strength 常指固定潜在的力量，指人，着重指力气，指物，着重指潜力等。如：

We don't know the strength of their team.

（4）force 主要指暴力，势力，说服力，压制力，法律、道德或感情的力量，总之，它是活动过程中的力。如：

The police had to use force when they took him to the police station.

6. discovery

n. 发现 the act of discovering sth.

Inspired by their discovery, many people went climbing the hills in search of more cave paintings.

由于受到他们发现的鼓舞,更多的人翻山越领去搜寻更多的洞穴壁画。 discovery的常见搭配：

an exciting discovery 令人兴奋的发现； a final discovery最后的发现； a great discovery 伟大的发现；

an important discovery重要的发现； a research discovery研究上的发现辨别：discovery与invention

discovery指发现的早已存在但未为人所知的东西； invention指发明以前没有的东西。如：

The discovery of Columbus was quite an event in the world.

The computer is one of the most important inventions of the twentieth century.

7. educate

vt. 教育 to teach people by giving lessons

Black children were educated in separate schools from the white children. 黑人与白人的孩子在各自的学校接受教育。

education n. 教育； educator n. 教育 工作者； educational adj. 教育的

辨别：educate 与teach