the cardinal number that is the sum of three and one
同义词：four??/??4??/??IV??/??tetrad??/??quatern??/??quaternion??/??quaternary??/??quaternity??/??quartet??/??quadruplet??/??foursome??/??Little Joe
administration of nutrients through a vein
同义词：intravenous feeding??/??IV
being one more than three
同义词：four??/??4??/??iv
The idea is that mothers would pour the liquid into the baby's mouth as part of an H.I.V.treatment program.
VOA : special.2010.05.24
So the first path then, the first path, 1 constant volume constant V, so I'm going to, again, let's just worry about energy.
首先，是路径，等压过程。
热力学与动力学课程节选 : 麻省理工公开课
Now we're going to hear Beach Boys, IV I guess,with a three-chord chord progression and it's going to be sub-dominant , V dominant , I tonic .
而现在我们来听听貌似是沙滩男孩，三和弦进行，然后将会是次属音，属音，和主音。
聆听音乐课程节选 : 耶鲁公开课
They believe the simian immunodeficiency virus,S.I.V., probably crossed from chimpanzees to humans in the last one hundred years.
VOA : special.2009.09.08
Scientists have believed that S.I.V.did not cause a similar immune system problem for primates.
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。