'a complementary relationship' is a correct and usable phrase in written English.
You can use it when referring to two or more elements of a system that are dependent on each other for each other's success. For example, "The manager and the employees had a complementary relationship that benefitted the company."
"So there is some kind of a complementary relationship".
A complementary relationship exists between the sequence of purines (i.e., adenine and guanosine) and pyrimidines (cytosine and thymine) in the DNA comprising a gene and the sequence in mRNA into which this genetic information is transcribed.
That desire for a complementary relationship between specialty and general advertising is also a goal of New A, which will have 100 employees at five divisions in offices in Los Angeles, New York and Toronto, handling accounts with billings estimated at $40 million for marketers like the E*Trade Group, MCI WorldCom and Metropolitan Life.
It can also be argued that a complementary relationship exists.
There are different explanations for a complementary relationship.
There is always a complementary relationship and a tension between platform devs.
The results of the estimation of the equation with the ambulatory case numbers as a dependent variable (Eq. 2) indicate a significantly complementary relationship for orthopaedics, gynaecology and ENT.
This is troubling, as large FDI flows have been a key driver of Asia's remarkable growth, pointing to a strong complementary relationship between FDI, export performance and productivity.
Thus in this speciality there can be talk of neither a clearly substitutive nor an unambiguously complementary relationship.
Mr. Williams says Twitter has "a very complementary relationship" with start-ups like CoTweet that build apps for specific audiences.
"The thinking behind this is that we have a very complementary relationship," said Vinnie Freda, executive vice president for digital logistics and business services at Universal Music Logistics.
