Sentence There is no such phrase as "key stone".
If you are referring to a keystone - the central wedge-shaped stone at the crown of an arch - then this phrase is correct and can be used in written English. For example: "The keystone of the arch kept the entire structure from collapsing."
Because every other stone of the conical roof depended on the "key" stone to prevent the roof from caving in, the owner was able to demolish their house simply by pulling this one stone out.
The ecosystem may need external inputs to recover its composition and function as soils are often impoverished and vegetal key stone species lost.
Key stone column design parameters, namely; length (both edge columns and central columns) and area replacement ratio, also have a pronounced impact for the seismic response of the reinforced foundation.
The recent discovery of new potent therapeutic molecules which do not reach the clinic due to poor delivery and low bioavailability have made of delivery a key stone in therapeutic development.
But when they finished the temple they were missing one key stone for the crown.
Take Trans-Canada's law suit against the US government over rejection of the Key Stone Pipeline filed under the auspices of NAFTA as a prime example.
RoRo carriers are key stones in shore based logistical systems and as a result diverse in design speeds and main dimension ratio's.
Our recent studies have shown an association between survivin and three key stones in the pathogenesis of RA: smoking [ 32], carriage of HLA-DRB1 antigen [ 33] and production of the RA-specific autoantibodies, rheumatoid factor (RF) and antibodies to citrullinated peptides (ACPA) [ 33– 33].
However, they require Key Stones to be opened.
Think of a misaligned projector - that's key stoning.
"Mud, fog, dripping trees, blackness, floods, mighty rushing winds under doors that don't fit, damp hassocks, sticking organ keys, stone floors and that dreadful smell of decay.
