The phrase "attainable only in" is correct and usable in written English.
It can be used to specify that something can be achieved or reached exclusively within a certain context or condition.
Example: "The highest levels of performance are attainable only in a supportive and collaborative environment."
Alternatives: "achievable solely in" or "possible only within".
Yossi Sarid, leader of the opposition Meretz Party, says complete quiet is attainable "only in graveyards, and we've got too many of those".
Crucially for theater three initiatives, companies must demonstrate superior social or environmental value for their external stakeholders while maintaining or improving internal bottom-line targets—a goal sometimes attainable only in the long run.
Often, and especially at the beginning of their participation, Orthodox delegates had recourse to separate statements, which made clear to the Protestant majorities that, in the Orthodox view, Christian unity was attainable only in the full unity of the primitive apostolic faith from which the Orthodox church had never departed.
But most of its trout lakes rest in designated wilderness areas, five or more miles away from roads, attainable only via foot power or horsepower, the kind that doesn't come with a set of reins and spurs.
LONDON — For a large number of young adults in Britain, homeownership has become increasingly difficult to achieve, viewed as a distant goal attainable only later in life, if at all.
Page B1 IN BRITAIN, OWNERSHIP FADES For a large number of young adults in Britain, homeownership has become increasingly difficult to achieve, viewed as a distant goal attainable only later in life, if at all, forcing more and more Britons into renting.
A cyclic-steady-state condition and auto-thermal behaviour are possible; nevertheless, they are attainable only for switching times varying in two narrow ranges.
However, accurate photometric data are attainable only from space.
Higher values are attainable only including a larger steam turbine.
In this respect, an ultracold cesium gas represents a particularly interesting situation, because Bose Einstein condensation seems attainable only for the absolute ground state.
This requires a reliable supply of low-cost iron with a uniform chemical composition, which is attainable only by keeping the operating condition of a blast furnace as constant as possible; this in turn requires a consistent iron consumer.
