In upper of the medium, the element accumulation of n, Ca, Mg, cu, Fe and Mn may be harmful to the plant.

试验显示营养液中的氮和钙、镁、铜、铁、锰等元素在基质上部富集，可产生肥料盐害。

youdao

Leaf N/ chlorophyll content and SPAD value increased with the increasing N fertilizer, and the lower leaves were more sensitive to the soil N supply than the upper leaves.

下位叶比上位叶对土壤氮的供应状况更为敏感，随着施氮量的增加，水稻叶片氮素含量、叶绿素含量、SPAD值相应的增加，而下位叶的增幅更明显。

youdao

This algorithm includes two levels:the lower level of N basic swarms and the upper level of elite swarm.

此算法采用上下两层，即下层N个基础种群和上层一个精英种群。

youdao

It says that function, f of x, is bounded above here's an upper limit on it, that this grows no faster than quadratic in n, n squared.

这意味着这个方法f是有上限的,这个方法增长的速度,不会比括号内的n*n快。

麻省理工公开课 - 计算机科学及编程导论课程节选

The George Washington Bridge, which connects upper Manhattan to Fort Lee, N.

FORBES: Magazine Article

There's been a huge growth in upper-end tourists coming to N.

FORBES: "We Weren't Hut People"

In the 1980s Weymouth drove from Manhattan's Upper East Side to Saratoga Springs, N.

FORBES