Immunologists now recognize a four-point response system of helper t cells: Th 1, Th 2, Th 17 and regulatory t cells.
免疫学家现在认识到了辅助性T细胞(以下代号th)的四点反应系统：Th 1, Th 2, Th17和调节性T细胞。
She has drawn up a four-point model that could be applied to the behaviour of any creature, including humans, to identify heroic ACTS.
她拟订了用来确定英雄行为的四点模式，可以应用于辨别任何动物(其中包括人类)的行为。
He asked his subjects to record how long each bowel movement took and rate the effort required on a four-point scale ranging from effortless to difficult.
他要求试验者记录每次排便的用时同时以从易到难用四个等级评估所需力气。
Forty-four point four percent of all children between the ages of ten and seventeen years were obese or overweight.
VOA: special.2009.07.21
It says H.I.V.-related deaths appear to have reached their highest point in two thousand four.
VOA: special.2009.12.02
The state and congressional elections of eighteen seventy-four were an important turning point.
VOA: special.2010.03.04
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