Exam: Cambridge English: B2 First (FCE)

Definition: Relating to something that can move or operate in two opposite directions.

Example: The new software allows for bidirectional communication between devices.

Definition: Relating to lenses or glasses that have two different optical powers, one for seeing far away and another for seeing close up.

Example: She wears bifocal glasses to help her see both the computer screen and the board at the front of the classroom.

Definition: A type of eyeglass lens that has two different optical powers, allowing the wearer to see clearly at both near and far distances.

Example: He needs bifocals to read and drive without changing glasses.

Definition: Relating to or able to use two languages, often with similar skill in both.

Example: She is bilingual and can speak both English and Spanish fluently.

Definition: A person who can speak and understand two languages well.

Example: She is a bilingual who speaks both English and Spanish fluently.

Definition: A large board used to display advertisements in public areas, often seen along roads or on buildings.

Example: The new advertisement on the billboard caught everyone's attention as they drove by.

Definition: To promote something by displaying it prominently, similar to how advertisements are shown on large signs in public places.

Example: The company decided to billboard their new product to attract more customers.

Definition: To stay or be housed in a particular place, often temporarily.

Example: During the war, soldiers would billet in local homes.

Definition: A billet is a small piece of material, often wood or metal, that can be used for various purposes, such as fuel or manufacturing. It can also refer to a job or position of employment.

Example: He used a billet of wood to start the fire in the fireplace.

Definition: To assign a place for someone to stay, especially for soldiers, often in a temporary manner.

Example: The commander decided to billet the troops in the nearby town.

Definition: Made from two different types of metal joined together.

Example: The engineer used a bimetal strip to create a more efficient thermostat.

Definition: Describing something that has two parts or components, or relates to a system that uses two as its base.

Example: In computer science, binary code is used to represent data using only two symbols: 0 and 1.

Definition: A system or concept that involves two parts or options, often used in mathematics and computing.

Example: In computing, data is often represented in a binary format, using only 0s and 1s.

Definition: The branch of science that studies the chemical processes and substances in living organisms.

Example: She decided to major in biochemistry because she was fascinated by how chemicals interact in the body.

Definition: Able to be broken down naturally by living organisms, such as bacteria, without causing harm to the environment.

Example: Using biodegradable materials helps reduce pollution and protect the planet.

Definition: The process in which living organisms, especially microorganisms, break down materials into simpler substances.

Example: Biodegradation is essential for recycling organic waste in the environment.