The phrase "adding that the significance" is correct and usable in written English.
It can be used when you want to elaborate on or emphasize the importance of something previously mentioned.
Example: "The researcher presented her findings, adding that the significance of the results could impact future studies in the field."
Alternatives: "noting that the importance" or "mentioning that the relevance".
"There are some pretty notable threat streams," one US military official told the Wall Street Journal, adding that the significance of the threats is still being assessed by counterterrorism experts.
When the gunman entered the vehicle, a partition between the driver's compartment and the rest of the vehicle was down, investigators said, adding that the significance of that detail was not clear.
He added that "the significance of The Times's ownership will be felt most immediately on The Trib editorial page," which until Jan . 2provided a selection of Times and Washington Post editorials and commentary; it now includes no copy written for The Post.
Nothing happened.' " Then, with no evidence to support a connection, Mr. Liddy added that the "significance is at that very time, John Sirica was then an assistant United States attorney for the District of Columbia, chargeable amongst other things with the enforcement of the Volstead Act," the federal prohibition law.
The ex-Australian international adds that the significance of securing a home quarter-final tie cannot be over-emphasised.
The aide added that the significance of the non-money events -– whether debates or convention speeches -- only increased in light of the Romney campaign stripping away the Obama campaign's money advantage.
Klein added that the significance behind her mouth and eyes disappearing was "because she is withdrawing her senses from the world of evil and going inward towards prayer and contemplation".
"All the nine cycles of solar activity during this period are characterized by systematically excessive wheat prices in the years of solar activity minimum, as compared with the prices during the next maximum," they say, adding that the level of significance is in excess of 99%.
She added that the true significance of the findings would be known only after human studies, but doing similar experiments in an MRI machine would be relatively easy.
"We are studying the significance of the tape," he said, adding that the government was releasing "all the new information we are receiving".
