原来

original; former; initial; primary; native; inherent; innate; originally; formerly; origin; source; beginning; in the first place

是我

it is me.

留住

leave on; tarry; retain; detain

幸运

lucky; fortunate; providential; auspicious; privileged; luck; fortune; good luck; good fortune; blessing; happiness; mercy; privilege; fortunately; luckily; mercifully; happily