Cách sử dụng
The expression "at source" means something happening or starting from the original place or point. It is usually used to describe a situation where a problem or issue is addressed right from the beginning or source rather than trying to fix it later on. For example, if the water in a river is polluted, it is better to try and clean it up "at source," by finding and addressing the cause of the pollution upstream, rather than just treating the water downstream. So, you can use this expression when you talk about addressing a problem right from the beginning or starting point to avoid bigger problems later on.