Oneself is used to mean 'any person in general' as the object of a verb or preposition, when this refers to the same person as the subject of the verb.
双语例句
例：
One must apply oneself to the present and keep one's eyes firmly fixed on one's future goals.
人们必须立足现在，目光锁定未来的目标。
2.?（前文无指涉主语）自己
Oneself is used to mean 'any person in general' as the object of a verb or preposition, when 'one' is not present but is understood to be the subject of the verb.
双语例句
例：
The historic feeling of the town makes it a pleasant place to base oneself for summer holidays.