New Words：

poison [ˈpɔɪzn]
n.毒药；毒物；毒素
v.毒害；下毒；毒死

Sample Sentences：

The dog was killed by rat poison.
He tried to kill himself by taking poison.

Someone tried to poison our dog.
Three people were poisoned by this chemical.

New Words：

term [tɜːrm] n. 学期
experiment [ɪkˈsperɪmənt] n. 实验;试验;尝试;实践

Sample Sentences：

He said he was going to teach us next term.
Are there any exams at the end of this term?

Some people feel that experimenting on animals is wrong.
Many people do not like the idea of experiments on animals.

New Words：

chemistry [ˈkemɪstri] n. 化学

Sample Sentences：

I have lost my interest in chemistry.
He's going to teach us chemistry next term.
We will do a Chemistry experiment this Friday.

term [tə:m] n. 学期
experiment [ɪkˈsperɪmənt] n. 实验;试验;尝试;实践

New Words：

chemical [ˈkemɪkl]
n.化学品；化学制品
adj.与化学有关的；化学的

Sample Sentences：

You must be careful when handling chemicals.
Dad brought all kinds of chemicals to kill slugs.
The land has been completely poisoned by chemicals.

Chip worked as a packer in a local chemical factory.
He said chemical weapons had never been sited in Germany.
I want to have a discussion with you on the price of your chemical products.

poison [ˈpɔɪzn]
n.毒药；毒物；毒素
v.毒害；下毒；毒死

New Words：

improve [ɪmˈpruːv] v. 改进;改善

Sample Sentences：

I need to improve my French.
I wish I could improve my spoken English.
How can I improve my writing if I cannot write complete sentences?