by itself
独自地; 无需外力地alone; without help
The machine will start by itself in a few seconds.几秒钟后,机器将自行启动。

The wounded horse could not raise itself from the ground.那匹受伤的马不能从地上站起来。
The land itself is worth the money, without the house.不算房屋,地皮本身就值那些钱。