《明史·志·卷五十六》
先后增减，则规定不一，大都根据时局缓急，米价高低，中纳者有利与否。
先后增减，则例不一，率视时缓急，米直高下，中纳者利否。
The reductions and increases were different, mostly based on the urgency of the situation, the high or low price of rice, and whether it was profitable for the middlemen to participate.
<s>[INST] 用英语解释这段文言文的意思: 先后增减，则例不一，率视时缓急，米直高下，中纳者利否。 [/INST] The reductions and increases were different, mostly based on the urgency of the situation, the high or low price of rice, and whether it was profitable for the middlemen to participate.</s>
用英语解释这段文言文的意思: 先后增减，则例不一，率视时缓急，米直高下，中纳者利否。
user
The reductions and increases were different, mostly based on the urgency of the situation, the high or low price of rice, and whether it was profitable for the middlemen to participate.
assistant