environmentally harmful 中文意思是什麼
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Lignin composes about 15 ~ 36 % by dry weight in norway spruce wood and has to be removed in chemical pulping for the manufacture of high quality paper. a slight decrease of lignin in wood ' s is estimated to significantly reduce the consumption of environmentally harmful chemicals during chemical pulping
木質素的存在影響到紙漿和造紙的質量，所以在木材加工成紙漿的過程中，必須用大量的化學物質除去它，這樣不但增加生產成本，而且在處理過程中會給環境造成很大的污染。 -
Re - place harmful substances with more environmentally friendly alternatives
用更多環保的替代品代替有害物質。
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