spruce: n.【植物；植物学】云杉(属)，云杉木〔又叫 spruce fir〕。adj.整洁的，潇洒的；漂亮的。vt.,vi.(弄)整洁；(把)打扮漂亮 (up)。 My study looks spruce. 我的书房看起来挺漂亮。 Mother told us to spruce the parlour for Christmas. 妈妈要我们把客厅收拾整洁过圣诞节。 You r
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 木质素的存在影响到纸浆和造纸的质量，所以在木材加工成纸浆的过程中，必须用大量的化学物质除去它，这样不但增加生产成本，而且在处理过程中会给环境造成很大的污染。
