New Words：

alert [ə'lə:t]
n.警报；警惕；警戒；戒备
adj.警觉的；警惕的；戒备的；意识到
v.向…报警；使警觉；使警惕；使戒备

Sample Sentences：

The alert leopard went up to a deer quietly.
We must be alert to the possibility of danger.
The boy was alert in answering the stranger's questions.
Although he's over eighty his mind is still remarkably alert.

Soldiers and police have been put on alert.
The doctor alerted me to the danger of a heart attack.

remarkable [ri'mɑ:kəbl] adj. 非凡的；奇异的；显著的；引人注目的
remarkably [ri'mɑ:kəbli] adv. 非常；极为；格外；出乎意料地

New Words：

creature [ˈkritʃər] n. 生物；动物
outer space 外太空

Sample Sentences：

Pandas are precious creatures.
Man is the only creature that is gifted with speech.
They have been visited by creatures from outer space.
Snail is a small plant-eating creature with a soft body.

New Words：

gravity ['græviti] n. 重力

Sample Sentences：

There is no gravity in space.
The stone rolled down the mountain by gravity.
When there is no gravity, our feet no longer stay on the ground.

New Words：

will [wil]
n.意志；毅力；自制力；意愿
v.想要；希望；愿意；喜欢

Sample Sentences：

I don't want to go against your will.
I don't know whether he is willing to come.
Someone who has a strong will does not give up.
I'd like to buy your house if you are willing to sell it.
They will also a bit nervous, But they was still willing to try new things.

New Words：

space buggy 太空车
spacesuit 航天服;宇航服

Sample Sentences：

You need to keep that spacesuit helmet closed.
All of these clothes are similar to the spacesuit designs.
The new-style spacesuit is much lighter than the older one.