背单词的时候为了不看原文意思，就把pdf里面有详细解释的单词提取出来了

附上python程序

from pdfminer.high_level import extract_text
from io import StringIO
import re
i = 0
file = open("./output/worlds.txt","w")
while(True):
    one_Page = extract_text("./pdf_files/test.pdf",
                        page_numbers=[i])
    i = i+1
    if len(one_Page)==0:
        file.close()
        break
    buf = StringIO(one_Page)
    words = buf.read().split("\n")
    for word in words:
        result = re.match(r"^[a-z][a-z]*[a-z]$|^[a-z][a-z]* $",word)

        if (result is not None):
            file.write(result.group()+"\n")

纯单词 txt文件下载
pdf文件下载 52yn
相应视频 0hg8