space bar

space-bar的词性：
n.（名词）

1. A bar at the bottom of the keyboard of a typewriter that when pressed down introduces a blank horizontal space into the typewritten matter, as between words.
空格杆：打字机键盘底部的杆，按下此杆时，打印的材料上就会出现空格，例如在字与字之间

2. Computer Science A bar with a similar position on the keyboard of a terminal, used to move the cursor or execute a function in a program.
【计算机科学】 空格键：计算机终端机键盘上相应位置的键，用于移动光标和执行程序功能