vtt英'viːt'iːt'iː美'viːt'iːt'iːEconomist⁵³⁵⁸¹⁺¹ 基本例句 超薄技术¹⁰⁰ Moreover, VTT is much less virulent than vaccinia WR but remains neurovirulent in mice and causes significant body weight loss after intranasal inoculation. 体内实验显示，尽管天坛株比神经毒性的 WR株毒性弱很多，但天坛株仍保留相当的神经毒性，而且经鼻腔接种可引起小鼠体重严重下降。 cnki