Press the backspace key to delete the last character.

按下退格键删除最后一个字符。

The backspace key is located above the Enter key on most keyboards.

退格键在大多数键盘上位于回车键的上方。

The Backspace key is really an Undo function, albeit a special one.

退格键实际上是一个撤销功能, 虽然它非常特殊.

And pressing the Backspace key deletes the character before the insertion point.

按退格键可删除插入点之前的字符.

Use the mouse pointer (or press the backspace key on your keyboard) to fire up the engine.

用鼠标指针（或按下退格键，你的键盘） ，以火了发动机。