"be expanded by" is a correct and usable phrase in written English.
It means to grow or become larger in size, scope, or detail. Example: The report needs to be expanded by including more research and data to support our findings.
Analysts believe the Bank's £325bn quantitative easing programme will be expanded by at least £50bn.
Grant programs that were part of the president's stimulus program would be expanded by $4 billion.
One big advantage: Battery "size" can be expanded by simply adding more chemicals and more storage tanks.
Cephalopods also have pigment cells that can be expanded by muscle contraction and can change colour very rapidly.
Some in the German military have said the NATO force needs to be expanded by as many as 6,000 troops to accomplish its goals.
The European operation will be expanded by the end of the year to offer services suited to the European marketplace, Mr. Zarb said.
Now, the largest Chabad center on Long Island is in Port Washington, where a 20,000-square-foot building will eventually be expanded by 10,000 square feet.
Entries can also be edited by friends, so an overly modest description of their part in a project could be expanded by a colleague.
Meanwhile, EU officials in Brussels said the list of Russians subject to visa bans and asset freezes would be expanded by the end of the week.
A new UN Scientific Advisory Board was established in 2014, and there have been recent calls for its remit to be expanded by the incoming UN Secretary General.
Many experts do not think that the program can possibly be expanded by next year to cover all of the 80,000 H.I.V.-positive people.
