by itself 独自地；无需外力地；自动地；单独；独力

【例句】
But Ron Paul realizes that this kind of education, or even pressure, is not going to work by itself.
罗恩·保罗意识到，这样的教育，或甚至压力，不会自动水到渠成。

He left the matter to clarify gradually by itself.
他让此事的真相逐渐自行澄清。