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Use "stepping-stone" in a sentence
"America is just a stepping-stone to interplanetary conquest."
""I'm pretty confident with my golf game right now after last week and I'm pretty comfortable on this golf course so I think it'll be a good stepping-stone for me.""
"The prime minister succeeded in pressing the British position that the war should continue in the Mediterranean with the invasion of Sicily by July as the stepping-stone for attacking Italy."