বই Four Corners 4 - ইউনিট 12 পাঠ A

to randomly discover someone or something, particularly in a way that is surprising or unexpected

a way in which a problem can be solved or dealt with

relating to the natural world and effects of human actions on it

a subject of significance or interest to someone or something

to not let someone to do something

a change in water, air, etc. that makes it harmful or dangerous

toxic and harmful substances in the air that can cause illnesses

বায়ু দূষণ,এয়ার কন্টামিনেশন

to join together in pursuit of a shared goal or advantage

মিলিত করা,একত্রিত করা

to regularly travel to one's place of work and home by different means

to keep a vehicle, building, road, etc. in good condition by doing regular repairs, renovations, or examinations

to not get involved with someone or something

to keep something in a particular place for later use, typically in a systematic or organized manner

to not let something increase in amount or number

to get rid of something that is no longer needed

to keep something from change or harm

সংরক্ষিত করা,রক্ষা করা

to get goods or services in exchange for money or other forms of payment

to make a waste product usable again

to be able to say who or what someone or something is

to get rid of waste material, particularly in an unorganized manner

a piece of work for someone to do, especially as an assignment

able to exist, happen, or be done

(of a system or machine) achieving maximum productivity without wasting much time, effort, or money

the poisoning of bodies of water caused by harmful materials

a dispenser that holds a substance under pressure and that can release it as a fine spray (usually by means of a propellant gas)

concerning or used in the scientific field of chemistry

রাসায়নিক

any object that can be used to store something in, such as a bottle, box, etc.

causing damage or negative effects to someone or something

an object that turns chemical energy to electricity to give power to a device or machine

ব্যাটারি,সঞ্চয়স্থান

in an appropriate manner according to established standards, rules, or expectations

the state of something at a particular time

the total number or quantity of something

to have power over a person, company, country, etc. and to decide how things should be done

to get rid of what is not needed or wanted anymore

the process of putting a product in a container or covering in order to be sold

a plastic or metal container with a lid, used for putting garbage in and usually kept outside the house

to discover the exact position or place of something or someone

to move to a higher position or rank

including every part, member, etc.

a person who regularly travels to city for work

a pathway typically made of concrete or asphalt at the side of a street for people to walk on

a place where trains regularly stop for passengers to get on and off

a vehicle that has two wheels and moves when we push its pedals with our feet

সাইকেল,বাইক

a city's railway system that is below the ground, usually in big cities

a building, usually next or attached to a house, in which cars or other vehicles are kept