The results show that s PEKK exhibited good catalytic activity and could be used repeatedly.

结果表明，S PEKK具有催化活性好、可循环使用等特点。

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The results show that s PEKK exhibited good catalytic activity and could be used repeatedly.

结果表明，S PEKK具有催化活性好、可循环使用等特点。

youdao