The results indicate that the nitrate-N leakage loss under the root zone caused by fertilizer irrigation could creat the pollution of shallow groundwater in Tangshan agricultural area.
计算结果表明，唐山农业区灌溉施肥引起根区以下硝态氮渗漏损失可造成浅层地下水的污染。
Plant absorption was not the main mechanism in reduction of both N and P, due to less plant biomass on wetland buffer zone.
缓冲带内的湿地植物量较小，决定了植物吸收并非氮磷去除的主要机制。
G ra de-N Division in working area is concluded on the basis of formed combined index, and critical zone alignment is determined according to both combined index feature and single index feature.
在所形成的综合指标基础上，作者又归纳了一种对研究地区进行多级划分的方法，并确定了基于综合指标数字特征和单指标数字特征的临界区间序列。
That announcement came yesterday, one week after the U. N. Security Council voted to enforce a no-fly zone over Libya.
该公告于昨天发表，这是安理会投票决定在利比亚设立禁飞区一周之后。
The active element zone is IC is matched with several active elements and the P-N joint zone is finished by ionic layout different type of dopants.
集成电路内有主动元件区，配置复数个主动元件。P-N接合区以离子布植不同型态的掺质而完成。
The zone change of soil microbial biomass C and N from north to south was not distinct.
土壤微生物量C、N从北到南的地带性变化规律不强。
Poisonous liquid, which in contact with water emits flammable gases, n. O. S. (Inhalation Hazard Zone a).
有毒液体，遇水释放可燃性气体，未作说明(吸入危害带a)。
Poisonous liquid, which in contact with water emits flammable gases, n. O. S. (Inhalation Hazard Zone a).
有毒液体，遇水释放可燃性气体，未作说明(吸入危害带a)。
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