0 the process by which nitrogen from the atmosphere is changed either naturally or in industry into compounds that are used in several processes -- 固氮
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Therefore, nitrogen fixation is unimportant as a source of this element for savanna plants.
These hypotheses will be tested as additional genomic, biochemical and geological evidence sheds more light on the evolution of nitrogen fixation, photosynthesis and cyanobacteria.
The objective of the present experiment was to assess seed composition and nitrogen fixation under these conditions.
Thus, at this point, the phylogenetic and molecular evidence indicate that nitrogen fixation arose before photosynthesis, but more work on this question is needed.
The evolution of nitrogen fixation also appears to have been a precondition for the evolution of (bacterio)chlorophyll-based photosynthesis.
This model involves the interplay of denitrification, nitrification and nitrogen fixation, but does not explicitly consider the influence of tracemetal availability for requisite enzyme activity.
By providing soil cover and nitrogen fixation they not only improve livestock feed but also help prevent soil degradation.
These results indicate that brassica residues could affect critical microbial processes, including nitrification, nitrogen fixation and mycorrhizal symbioses.
控制你的情绪
What makes me angry?
什么事会让我愤怒呢?
Mostly,l hate when someone tries to make someone else feel bad.
通常这种情况下,当有人试图使别人觉得不舒服时,我会非常愤怒。
I have to admit that once, when l was actually called names.
我不得不承认,有一次我在实在很生气的时候骂了人。
l regretted doing this afterwards, but not full heartedly because l think l was provoked in that situation.
之后我很后悔那样做,但是我不认为全是我的错,因为我认为在那种情况下,我是被激怒了。
The most postive way of dealing with anger is talking about the problem.
解决愤怒的最积极的方法是把问题说出来。
l talk to someone who listens, or l'll write my thoughts down on paper.
我说给愿意听的人,或者把我的想法写在纸上。
Learning how to deal with anger as you're growing up is so important.
在你的成长过程中,学会处理愤怒是非常重要的。
When you're younger, you might yell,or cry when you're angry, but as you get older, you're expected to handle your emotions much better.
小时候,你生气的时候可以大喊大叫或者哭闹,但长大后,你被期望能更好地控制情绪。
Learning to control your emotion now will prevent you from doing something that you'll regret later on in life!
现在就学着控制情绪能让你避免做一些可能使你以后遗憾一生的事情。