As it is often said that "a year's plan starts with spring", farmers start to sow seeds at this time to lay the foundation for a good harvest for the year.
首先这里的 as 不可能引导定语从句,因为从句不缺成分,而as引导定语从句时一般充当从句中的主语或宾语,如:
As we said at the meeting, our goal is to meet the needs of the customers.
正如我们在会议上说的那样,我们的目标是满足客户的需要。
这句话中的 as 代替 said 的宾语。
那第一句话中 as 引导什么类型的状语从句呢?