求翻译：这是最新的手册出口数量,请注意:第三本和第四本的SD出口数量更改了,因为PTA的进口数量只能生产这个数量的SD产成品,请在计划出口时注意这个可出口的数量.谢谢!是什么意思？

This is the latest manual export volume, please note that the third and fourth of the number of SD export changed because PTA imports only produce the number of SD products, please note that you can export in planning export quantity. thank you!