构词是前缀ex+tract词根,中文意思是v. 提取,提炼取出,拔出摘录索取,设法得到开(方),求(根),n. 选段,引文提取物,汁

例如

They need to extract as much information as possible from the first or second reading.他们需要从第一遍或第二遍的阅读中提取尽可能多的信息。