Ideally, the use of these two functions should be limited to dragging and dropping interfaces, where the click would not make a suitable replacement.
理想情况下，这两个函数的使用应该限于对界面的拖放，因为这种情况下单击不会有合适的替代。
After dragging something into one of these text boxes, you click the button next to it, and that something is turned into a widget.
将某个东西拖放到其中一个文本框中之后，单击旁边的按钮，然后就可以转换成一个小部件。
Alternatively, you can click Class and then click on the canvas instead of dragging.
也可以单击Class并在画布上单击来代替拖动。
Click the left mouse button and hold it down while dragging the cursor to the Customize Portlets dialog box (Figure 11).
在将光标拖拽到Customizeportlets对话框时，点击鼠标左键(参见图11)。
Attach files by dragging and dropping or Click to Select.
附加文件通过拖放或单击以选中。
Attach files by dragging and dropping or Click to Select.
附加文件通过拖放或单击以选中。
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