Cách sử dụng
The expression "buckle down" means to start working hard and focusing on a task. It is often used when someone needs to concentrate and put in extra effort to achieve a goal. You might hear it in a school setting when students need to study for a big exam or finish a project. It can also be used in personal situations when someone needs to commit to a task or goal. For example, if someone wants to lose weight, they might say they need to "buckle down" and start exercising regularly and eating healthy.