The phrase "a twofold impact" is correct and usable in written English.
It can be used when discussing effects or consequences that have two distinct aspects or dimensions.
Example: "The new policy will have a twofold impact on employee productivity and morale."
Alternatives: "a dual effect" or "a two-pronged effect".
His deals have had a twofold impact.
In these anxious times, dogs could have a twofold impact on potential terrorist attacks: deterrence and detection.
Indeed, forestry plantations have a twofold impact on water rainfall or aquifer recharge interception and direct extraction of groundwater in shallow water table areas and alter the available water for irrigation as a result of the previous water budget.
The selective thinning had a twofold impact on the development of the modelled growth characteristic: during the first 5-year period it decreased and during the second period it increased the height increment.
It follows from (43) that the delay term l r Nss has a twofold impact: a variation of the row index (subscript) of the input signal x[m] on the one hand and an integer number of samples shift over its sample index on the other hand.
So the final school grade has a twofold impact within the whole admission procedure.
Developing others has the twofold impact of elevating performance and creating a culture that is fun and engaging.
It is important to note that neither of the above scenarios is mutually exclusive, and combined action of different steps may result in the twofold impact on transcription.
In a town of fewer than 3,000 residents, it was the kind of disaster that had a twofold and threefold impact on people.
Arccos has a twofold mission in impacting the golf industry: (1) improve the performance and enjoyment of the game for individual golfers and (2) arm golf business operators with data that previously went unrecorded to help them make smarter decisions.
A twofold study was conducted to determine the impact of the effluent waste on the water stream.
