"underscores one of" is a correct and usable phrase in written English.
You can use it when you want to emphasize an idea or point. For example, "His powerful speech underscores one of the main values of the organization".
Economists at Merrill Lynch commented Friday in a note about the Hong Kong data: "The strong number underscores one of our key points right now: Postcrisis recoveries in Asia usually surprise on the upside".
And it's good for voters in general — including the mysterious Undecideds — because it underscores one of the starkest differences between the Obama and Romney tickets.
That situation underscores one of the objections to these summit meetings: all the leaders want praise for their policies for use back home.
Mr. Bush's handling of the Bob Jones firestorm underscores one of his campaign's biggest weaknesses: while Mr. Bush and his operatives are adroit at moving offensively to promote their agenda, they often seem to linger as controversies swell around them.
That, in essence, is the question being angrily posed by the Israeli government of Prime Minister Benjamin Netanyahu and underscores one of the biggest shifts in American policy toward the Israeli-Palestinian conflict in three decades.
The difficulty of reaching agreement underscores one of the central questions about how government should address the ups and downs of the business cycle: whether tax policy is always going to be so slow-moving that it can never be an effective anti-recession tool, especially when contrasted with the Federal Reserve's ability to slash interest rates quickly.
According to a New York Times feature published days before the event, Chionesu and Coney elected to go with a grassroots promotion approach to underscore "one of the march's main objectives, solving local problems without calling on elected leaders and mainstream groups".
Freedland's concerns underscore one of the key questions looming over Britain's future.
This may seem like a picayune detail, but it could underscore one of the biggest differences between the two men.
His point underscored one of the limitations of Breakroom: ultimately, you're still sitting at your desk.
Mr. Bush underscored one of the hazards of debating a woman when he later gloated into an open microphone, "We tried to kick a little ass last night".
