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。
A hui may be a wedding, burial or conference. The happier events are marked with speeches, singing and dancing.
一个"会"可能是一次婚礼、葬礼或者会议。而较为喜庆的活动,人们要发表演说,唱歌跳舞以示庆贺。