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secondhand
- meaning：Something that someone else owned or used before you.
- Example：I bought a secondhand bicycle from my friend.
be worried about ~
- meaning：Feeling concerned or thinking something might go wrong.
- Example：I was worried about my dog because it wasn’t eating.
environment
- meaning：The air, land, water, and everything around us.
- Example：We should pick up trash to help the environment.
give off ~
- meaning：Something that sends out or produces something, like light, heat, or gas.
- Example：A candle gives off light.
pollution
- meaning：Dirty or harmful things in the air, water, or land.
- Example：Throwing trash in rivers causes water pollution.
look up ~
- meaning：Searching for information about something.
- Example：I am looking up pictures of cats online.
technical
- meaning：Something related to machines or science, usually a little complicated.
- Example：The technical manual shows how to fix the computer.
information
- meaning：Facts or details about something.
- Example：I asked for information about the school trip.
internet
- meaning：A place on computers where people can find information, watch videos, or talk to others.
- Example：I watched a video about dinosaurs on the Internet.
vehicle
- meaning：Something you can drive or ride in, like a car, bus, or bike.
- Example：A bus is a big vehicle that carries many people.
fuel
- meaning：Something like gas or electricity that makes vehicles or machines work.
- Example：Cars need fuel to move.
economy
- meaning：Using less to save money or resources.
- Example：This car is good for fuel economy because it uses less gas.
deliver
- meaning：Something that is brought to you.
- Example：The postman delivered a package to our house.
be satisfied with ~
- meaning：Feeling happy or pleased with something.
- Example：I am satisfied with my drawing because it looks nice.
