Critics have charged that the Magic's four-out system, heavily reliant on the vagaries of 3-point shooting, is too unstable to succeed.
批评主要集中在魔术四人在外的体系，过度依靠3分球想要赢球太不稳当。
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。
The key point of this paper is the software design and hardware design for on-line signature data acquisition system based on four-line resistance touch panel.
本文研究的重点是基于四线电阻式触摸屏的在线签名数据采集系统的软硬件设计。
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