Shown below in Figure 5, the output card of the map Map_Choose shows the CHOOSE function, which selects the second instance of the Field element from the input message.
如图5所示，映射Map_Choose的输出卡使用了choose函数，它选择输入消息中Field元素的第二个实例。
You can select an individual value from an input range using the CHOOSE function, which makes the selection based upon the position of the value in the series. The CHOOSE function takes two arguments.
可以使用CHOOSE函数从输入范围中选择单一值，它根据值在序列中的位置做出选择。
The EXTRACT function is a very efficient way to select a group of values, but if the expected result set is just a single object then you are better off using the CHOOSE function previously discussed.
EXTRACT函数是选择一组值的非常高效的方法，但是如果预期的结果集只是单一对象，那么最好使用前面介绍的choose函数。
The EXTRACT function is a very efficient way to select a group of values, but if the expected result set is just a single object then you are better off using the CHOOSE function previously discussed.
EXTRACT函数是选择一组值的非常高效的方法，但是如果预期的结果集只是单一对象，那么最好使用前面介绍的choose函数。
应用推荐