The phrase "a number of significant developments" is correct and usable in written English.
It can be used when discussing multiple important changes or advancements in a particular context, such as business, technology, or research.
Example: "In the past year, there have been a number of significant developments in renewable energy technology that could change the industry."
Alternatives: "several important advancements" or "multiple key changes".
Hawtrey deserves credit for a number of significant developments to which his analysis led him.
A number of significant developments in various fields have occurred during the 20th century: the digital computer, improvements in data-storage technology and software to write computer programs, advances in sensor technology, and the derivation of a mathematical control theory.
A number of significant developments have emerged today in the SpinVox saga.
I am writing to inform you of a number of significant developments related to the Company, including the renegotiation of the terms of the Company's Series C financing, and to request your approval of, and to offer you the opportunity to participate in, the revised financing.
Since that time, a number of significant developments have been made in diesel engine technology that require a new look at the future acceptability of introducing significant numbers of light-duty diesel automobiles into the European and American markets.
In the context introduced by the UNICEF IRC Insight report on 'Caring for Children Affected by HIV and AIDS', being presented today by UNICEF to stimulate debate on the continuing grave situation of this highly vulnerable group, the past year and a half have seen a number of significant developments with regards to children affected by HIV/AIDS.
This review covers books, proceedings, and review articles published on 2D correlation spectroscopy, a number of significant conceptual developments in the field, data pretreatment methods and other pertinent topics, as well as patent and publication trends and citation activities.
There have been a number of significant housing developments within Frome, many on former industrial sites, and these are continuing with plans for the redevelopment of a site at Saxonvale and Garsdale to include several hundred dwellings, shops and a 'cultural quarter' containing workshops for artists.
The annotation of models with the MIRIAM standard provides a number of significant advantages in the development of computational tools and applications that can reason over them (Kell and Mendes, 2008).
Just as HIV helped to catalyze a number of significant scientific, policy, and political developments beyond the epidemic itself, we should be using the opportunity of this latest phase of the epidemic to inspire shifts in our broader understandings of what "chronicity" means and how we should respond to it.
