One skyscraper with smooth lines and a building with a non-standard roofOne skyscraper with smooth lines and a building with a non-standard roof
One egg in natural color on a black-white backgroundOne egg in natural color on a black-white background
The old year 2012 is going away a new one is comingThe old year 2012 is going away a new one is coming
One short word, and how many after thoughts in the headOne short word, and how many after thoughts in the head
Без других, в отдельности. Тот же самый, тожественный. Единый, целостный. Число, цифра и количество 1. Какой-то, некий. Только, исключительно. Какой-нибудь в ряду сходных.