The trees produce a chemical to protect themselves from inse
The trees produce a chemical to protect themselves from inse
trees can produce some chemicals to protect themselves from_
Trees can then protect themselves by producing a chemical th
It is necessary to protect trees from the frost.
To protect themselves from the icy water,they had to wear sp
帮我做道阅读题文:Most animals have a way to protect themselves from
They want to protect themselves for the strange environment.
Trees take in harmful gases from the air ang produce oxygen
people plant more and more trees to protect the earth
they could protect themselves from the sun and cold.这里cold是名
How to Protect Ourselves from A/H1N1
英语翻译anything from walking to a heartbeat could produce energ