Cách sử dụng
'Per' is a Latin word that is often used to describe a rate or a unit of measurement. It means 'for each' or 'by the', and is used to express a relationship between two quantities. For example, if you're talking about the price of something, you might say it costs $10 per pound. This means that for every pound of the item, it costs $10. Another example of using 'per' is when you're talking about a rate of speed or time. For instance, you might say you can swim 50 meters per minute, which means you can swim a distance of 50 meters in one minute. Similarly, you could say you earn $20 per hour, which means you make $20 for every hour you work. In general, 'per' is a useful word to have in your vocabulary when you need to talk about a ratio or relationship between two things. It helps clarify how much of one thing you get in exchange for another.