＃长难句每日一句＃是一道配菜，建议你首先消化课程所讲内容之后，再每天来一个长难句来填满碎片时间。切不可不听，每天只练一个长难句，那就本末倒置了。
Biomass is technically a “renewable” energy source, in that trees can be replanted after they’re harvested. And some lawmakers have argued that because trees store carbon as they grow, replacement forests will gradually remove the carbon dioxide emitted when the previous trees were burned for energy, making the whole process carbon neutral—that is, putting no net emissions into the atmosphere.生物质在技术上是一种“可再生”能源，因为树木可以在收获后再种植。一些立法者争辩说，因为树木在生长的过程中会吸收碳元素，新种植的树木将逐渐吸收人们燃烧先前种植的树木获取能量时释放的二氧化碳，这使得整个过程是碳中性的，也就是说，最终没有向大气排放排放物。But there are some serious flaws in that argument, many scientists suggest. One of the biggest issues is the matter of timing. Burning biomass for energy releases large amounts of carbon into the atmosphere all at once. But depending on the type of tree, forests may take decades or even a century to draw the same amount of carbon back out of the air.argument /ˈɑ:ɡjumənt/ n. 辩论；论据suggest /səˈdʒest/ v. 提议；认为issue /ˈiʃu: 英ˈisju:/ n. 重大问题，有争议的问题；担忧release /riˈli:s/ v. 释放；放出atmosphere /ˈætməsfiə(r)/ n. 大气；气氛1. But there are some serious flaws in that argument, many scientists suggest.该句主干为there be 句式，需注意的是in that 并非表“因为”，that修饰argument。
2. One of the biggest issues is the matter of timing.
该句为主系表结构，One of the biggest issues /is /the matter of timing. 其中time用作动词。
3. Burning biomass for energy releases large amounts of carbon into the atmosphere all at once.
该句为主谓宾宾补结构，Burning biomass for energy/ releases /large amounts of carbon/ into the atmosphere.…
4. But depending on the type of tree, forests may take decades or even a century to draw the same amount of carbon back out of the air.
该句为主干为主谓宾宾补结构，…, forests /may /take decades or even a century /to draw the same amount of carbon back out of the air; 其中depending on the type of tree 为状语成分。But there are some serious flaws in that argument, many scientists suggest. One of the biggest issues is the matter of timing. Burning biomass for energy releases large amounts of carbon into the atmosphere all at once. But depending on the type of tree, forests may take decades or even a century to draw the same amount of carbon back out of the air.但许多科学家认为，这一论点存在一些严重缺陷。最大的问题之一是时间问题。燃烧生物质的能量会瞬间向大气中释放大量的碳。但是，由于树木种类的不同，森林可能需要几十年甚至一个世纪才能将同样数量的碳从空气中提取出来。One could argue that the process has the potential to be carbon neutral over very long time scales but not in the short term. And that means it’s not a useful strategy when world leaders are working to reduce global carbon emissions immediately.
