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труден только первый шаг stresses
gen.	it is the first step that costs; a journey of a thousand miles begins with one step; it's the first step that costs
idiom.	it is the first step that costs (Yeldar Azanbayev)
inf.	only the first step is difficult (Damirules); it is the first step that counts (Damirules); it's the first step that counts (Damirules)
proverb	the first step is the only difficulty (Helene2008)