estimate in =arrive

irritate your eyes

monoxide dioxide oxide

sulphur dioxide

deadly friendly

elderly

at the top of lung

fall into disorder

odourless

rat poison

side effects

air turbine

radioactive waste

dispose of 处置

endanger

beautify the environment

thermal underwear

maximum minimum

hang over 笼罩

react with

an acid can react with a base to form a salt

give off (heat ,light)

keep ... free of

in the meantime=at the same time

do damage to (the crops)