采用双极调制方式单周控制APF补偿后的电源电流中存在直流分量。
There are DC off-sets in the compensated source current of the APF with one-cycle control under bipolar modulation.
结果表明，泰和鸡的肾小球旁器由球旁细胞、过渡型致密斑、球外间膜细胞和极周细胞所组成。
The results show: The JGA of Taihe fowl consisted of juxtaglomerular cells, transitional macula densa, extraglomerular mesangial cells and peripolar cells.
疫苗免疫雏鸭后能够显著（P<0.05）或极显著（P<0.01）地增强T细胞的免疫力，时间持续两周。
The notably enhanced cell mediated immunity in the experiment group was different (P<0.05) or very different (P<0.01) from the control and was about 2 weeks in duration.
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