单词学习：pure 形容词
pure
/pjʊər/
adj. 纯的，纯净的；纯粹的；纯洁的；纯理论的
The water in this bottle is as pure as the knowledge that Teacher Gu imparts to us.
这瓶水就像顾老师传授给我们的知识一样纯净。
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