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.

New Words：

store [stɔ:]
v.保存；贮藏；贮存
n.商店；店铺；仓库；(大型)百货商店

Sample Sentences：

Water is stored against the dry season.
This animal makes a store of nuts for the winter.
Could you stop by the store on the way home for some bread?
Thousands of pieces of data are stored in a computer's memory.

New Words：

lychee ['laitʃi:] n. 荔枝
longan ['lɔŋgən] n. 龙眼

Sample Sentences：

Longan fruit is not easy to store for long time.
Lychee is also a kind of hot fruits, so not eat too much at one time.
Lychees were the favorite fruit of a famous queen in Chinese history.
If you come to my home, I invite you to taste lychees, longan, pineapple and so on.

store [stɔ:] v. 保存；贮藏；贮存