At 12:00 anion concentration difference reaches the max in and outside the plant communities,and at 16:00 it is the lowest. Moreover the concentration difference turns from increase to lower showing to a parabola.7.
6.中午12:00群落内外负离子浓度差值达到最大,16:00差值偏低,而且浓度差先升高后降低,呈抛物线形。
参考来源 - 上海公园绿地植物群落景观评价及优化模式构建·2,447,543篇论文数据，部分数据来源于NoteExpress
这样在电极下及具附近将构成一个浓度差结。
There is a concentration differential junction under the electrode-site.
测定前臂动静脉血中甘油三酯的浓度差及氮平衡。
Their arterial and venous concentrations were measured across the forearm.
分析了强度调制和甲烷浓度差分检测原理，建立了光纤光栅式差分检测方案；
The principles of intensity modulation and difference absorption are discussed. The scheme of fiber grating and difference absorption detection is designed.
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