失败的主要原因包括卵圆孔穿刺失误，迷走神经反应，无扳机点和普鲁卡因测试不能达到完全不痛。
The major failure causes included puncture muff, severe vasovagal reactions, the absence of a distinct trigger zone and incomplete analgesia after the procaine test.
失败的主要原因包括：卵圆孔穿刺技术，迷走神经反应，无扳机点，普鲁卡因测试不能达到完全不痛。
The major failure causes included technical difficulties, vasovagal reactions, the absence of a distinct trigger zone, and no analgesia induced by procaine test.
本文介绍了目前RNA干扰作用机制，与之相关的酶、蛋白、“扳机点”和调节因子，及RNA干扰在生物学方面的应用。
This review introduces the enzymes, proteins, triggers, and regulators associated with mechanisms of RNAi, as well as the applications of RNAi in biology.
上周日凌晨，特华纳的儿子开车将他和家人送往亨廷登县的Broad top山顶，大约上午8点左右，一头雄鹿突然从树林中蹿出，布莱恩立刻提醒父亲，老人瞬时扣动扳机，一枪击倒正在狂奔的猎物。
At dawn Sunday, the sons drove him to the summit of Broadtop Mountain in Huntingdon Country. At 8 am, a buck ran out of the woods, and Brian pointed it out to his father.
上周日凌晨，特华纳的儿子开车将他和家人送往亨廷登县的Broad top山顶，大约上午8点左右，一头雄鹿突然从树林中蹿出，布莱恩立刻提醒父亲，老人瞬时扣动扳机，一枪击倒正在狂奔的猎物。
At dawn Sunday, the sons drove him to the summit of Broadtop Mountain in Huntingdon Country. At 8 am, a buck ran out of the woods, and Brian pointed it out to his father.
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