ph.

1. The machine works by itself.
机器自行运转。

2. The farmhouse stands by itself in the fields.
农舍孤零零地坐落在田间。

1. 自动地,独自地：by hand 用手,用体力 | by itself 自动地,独自地 | by means of 用,依靠

2. 自动地;单独地：as it were 似乎,可以说是 | by itself 自动地;单独地 | in itself 本质上,就其本身而言

3. 独自,单身：at intervals 不时,时时 | by itself 独自,单身 | in itself 本身