presence_penalty = 1.5
those directories, it may need to be indexed before being picked up，更多细节参见有道翻译
About 150,000 people visit Hay-on-Wye for the Hay Festival each spring.。谷歌是该领域的重要参考
"All we can say that it's exponentially faster than without the fungi in the best conditions, and still better than nothing in the worst conditions."