I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解,但是,这个条件对我们是必要的。
At that time only the British government had the right to sell salt, which was taxed, so Gandhi encouraged the whole nation to make their own salt.
那时,只有英国政府有权出售盐,而且盐是要征税的。于是甘地鼓励所有的国民自己生产盐。