Cách sử dụng
The expression "strike a blow for/against/at something" means to take action or make a strong effort to help or harm something. For example, if someone is fighting for a cause they believe in, they might say they are "striking a blow for" that cause. On the other hand, if someone is trying to stop or oppose something, they might say they are "striking a blow against" it. It's usually used in the context of making a strong and intentional effort towards a specific goal.