前者表示集合中第一项的索引为0，后者表示第一项的索引为1。
The former means that the index of the first item in the collection is 0, and the latter means that it is 1.
因此第一项任务是构建一个表示整个数据集的XML文档。
So the first task was to build an XML document that represented the whole data set.
内部矢量中的第一项是键（本例中为 movie-title），第二项是值（本例中是一个表示放映时间的整数）。
The first item in the inner vector is the key (in this case, movie-title), and the second is the value (in this case, an integer representing the running time).
第一项是患，这是实时文件扫描代理商表示，将扫描所有档案，目前正在使用或取什么对你的系统。
The first of these is AMON, which is the real-time file scanning agent that will scan all files that are currently being used or accessed by anything on your system.
跃迁矩阵元被表示为两项，当入射电子和散射电子近似为平面波时，跃迁矩阵元的第一项是一个发散的复数；
The first term of this transition matrix element is a divergent pluralism when the incident and scattered waves are chosen as plane wave.
跃迁矩阵元被表示为两项，当入射电子和散射电子近似为平面波时，跃迁矩阵元的第一项是一个发散的复数；
The first term of this transition matrix element is a divergent pluralism when the incident and scattered waves are chosen as plane wave.
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