The phrase "requires strengthening" is correct and usable in written English.
You can use it when you are trying to suggest that an idea or proposal should be improved or made more effective. For example: "This plan requires strengthening if we want it to be successful."
Here, again, strengthening Europe requires strengthening the alliance.
Retrofit of existing steel buildings often requires strengthening of the connection regions.
Taylor says that club owner Pozzo and head coach Jokanovic have to assess quickly where the squad requires strengthening.
In our conclusion, we argue that to secure safe and sustainable food provision, the present government-based trust regime in China requires strengthening through linking up with market- and civil society-based trust regimes, complemented by elements of personalised trust.
That means that the agreement requires strengthening, not weakening.
Although any attempt to reactivate Operation Mare Nostrum would prove politically controversial, its current replacement Operation Triton requires strengthening.
KT requires strengthened MoH institutional capacity to lead the KT process.
Success in Colombia required strengthening the capacity and integrity of the country's policing, prosecutorial and judicial institutions.
It is time for final preparations: honing the extreme fitness required, strengthening the bonds that will matter most in the lung-burning torture of a gold medal game.
Cutting new openings weakens the overall response of such elements, so they usually require strengthening.
Middlesbrough require strengthening in midfield, after releasing Julio Arca, Nicky Bailey and Kieron Dyer at the end of last season.
