Both "helper" (CD4) and "cytotoxic" (CD8) T-cell classes have been described.
现已明确两类T细胞：辅助性T细胞(CD4)和细胞毒性T细胞(CD8)。
Antibody production that is stimulated through increased helper T-cell function can activate complement.
通过增加辅助性T细胞的功能能够刺激抗体生成，活化补体。
The CD4 + test directly measures the abundance of the helper t cell, an of immune cell in the bloodstream distinguishable because they are the only ones that carry the CD4 marker.
CD 4 +试验直接检测辅助型T细胞数量。辅助型T细胞是血流中可分辨的免疫细胞中的一种，因为只有他们才具有CD 4标志物。
Like oTher viruses, HIV needs a hosT cell To mulTiply. IT aTTacks helper T cells and can infecT oTher cells.
像其它的病毒一样，HIV病毒也需要一个主体细胞来繁殖。它攻击辅助T细胞并感染其它的细胞。
Objective To investigate the changes of serum T helper cell (TH)1/TH2 type cytokines after the active immunotherapy in unexplained habitual abortion (UHA) women.
目的探讨原因不明习惯性流产（UHA）患者主动免疫治疗前后血清T辅助细胞（TH）1/TH2型细胞因子的变化。
Before a helper t cell can trigger a response to a pathogen or parasite, it has to "feel" these molecular bits of an invader displayed on the surface of an antigen-presenting cell (APC).
在辅助T细胞激发针对病原的免疫反应之前，它必须感觉到位于抗原递呈细胞面表的入侵者分子片段。
This review summarizes theory and method-ology of prediction for helper T cell epitopes, and their application in vaccine development against parasites, and new research directions are also discussed.
本文概述辅助T细胞表位预测的理论和方法及其在寄生虫疫苗研发中的应用，并讨论未来的研究方向。
Profound immunologic changes occur during pregnancy, involving a polarization of t helper cells towards a dominance of Th2 and regulatory t cell effector responses in both mother and fetus.
意义深远的免疫性的改变发生在怀孕期间，对于在母亲和胎儿中多数的th2和调整的t细胞效应器都反映包括了th细胞的极化。
Profound immunologic changes occur during pregnancy, involving a polarization of t helper cells towards a dominance of Th2 and regulatory t cell effector responses in both mother and fetus.
意义深远的免疫性的改变发生在怀孕期间，对于在母亲和胎儿中多数的th2和调整的t细胞效应器都反映包括了th细胞的极化。
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