The phrase "are only introduced" is correct and usable in written English.
It can be used when discussing the timing or manner in which something is presented or made known, often in a context where exclusivity or limitation is implied.
Example: "In this chapter, new concepts are only introduced after the foundational theories have been established."
Alternatives: "are merely presented" or "are solely revealed".
The extreme case of reverse innovation is the development of new products in emerging countries which are only introduced in developed markets.
An attractive route to carry out such studies is to perform ex situ assays, where the dye molecules are not present in the reaction mixture, but instead are only introduced into aliquots taken from the reaction at regular time intervals to avoid the possibility that the dye molecules interfere with the aggregation process.
For them, therefore, actual causation is a relation between static states (variable values), and changes in states are only introduced in the counterfactual part of their analysis.
First, the integrity and stability of the aptamers is easily preserved during the bioconjugation process since the aptamers are only introduced for a short period of time during the hybridization process.
Hybrid males are sterile and their fertility does not resume until the fourth backcrossing generation (Deakin et al. 1935; Cai 1989; Tumennasan et al. 1997; Zhang 2000; Hisabumi et al. 2002), and therefore male-mediated cattle introgression in yak is impossible (e.g. Jianlin et al. 2002) and thus the cattle genes are only introduced into yak genome by hybridization of female F1 hybrids to yak.
The change was only introduced two years ago in 2011.
The detailed ruling shows the evidence about the cat was only introduced by a witness.
The source said: "The buffer zone was only introduced in the framework of hostilities".
He is, however, abolishing the carbon reduction commitment - a complicated reporting regime that was only introduced in 2010.
3.31pm GMT Albert Owen, Labour, is also asking about the eco levies, pointing out they were only introduced in April.
In the UK, where AVT was only introduced just over 10 years ago, speech therapists' attitudes are slowly changing.
