阅读下面的短文，在空白处填入1个适当的单词或括号内单词的正确形式。

However, Tu Youyou would not acknowledge defeat. She analysed the medical texts again, and by chance, she found one sentence  (suggest) a different way to treat the wormwood. She concluded that boiling the sweet wormwood apparently destroyed  medical properties. (use) a lower temperature to draw out the extract, she found a substance that worked.