Your gas bills should give a figure for your usage each quarter - but remember you use very little in the summer months, so you'll need to add up the total across all four quarters.
燃气费账单上显示的应是每个家庭每季度的使用量——但请记住,夏季的燃气使用很少,所以你需要将四个季度的燃气使用量加在一起。
You can add new fields and operations to a visualized C++ class by using either the pop-up menu (Figure 23) or the pop-up action bar (Figure 24).
您可以通过使用这个弹出式菜单(图 23)或者弹出式操作栏(图 24),为可视化 C++ 类添加新的域和操作。
Right-clicking on the grid opens the pop-up menu ( Figure 7) that you use to add or maintain the datapool structural elements already described here.
右键点击这个虚框,打开弹出式选单( 图7),用它来添加或者维护已有的数据池构件元素。
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