a field mouse

A few months back while sitting in a boat fishing with a couple of friends, I noticed a field mouse on the river bank.

几个月前，我和几个朋友坐在船上钓鱼，注意到河岸上有一只田鼠。

Clicking the button displays a calendar in a drop down menu, and selecting a date using the mouse enters the corresponding string into the text input field.

点击那个按钮，会在下拉菜单中显示一个日历，然后使用鼠标选择日期，相应的字符串就会输入到本文输入域中。

Imagine a Web form that responds to you not just when you click a button, but when you type into a field, when you select an option from a combo box... even when you drag your mouse around the screen.

设想一下，当单击按钮、输入一个字段、从组合框中选择一个选项或者用鼠标在屏幕上拖动时，Web表单能够立刻作出响应会是什么情形。