"critical supplement" is a correct and usable phrase in written English.
You can use it when referring to an addition to something that is important or necessary to complete a task. For example, "The critical supplement to the software update allowed the program to function properly."
These topics have monopolized the attention of numerous authors ("Diaghilev's Ballets Russes," by Lynn Garafola, would ideally come packaged with this biography as critical supplement).
In postmodernity, we find a critical supplement to the tradition of first-order wisdom.
With future technological breakthroughs, these resources will probably enter a gradual exploitation phase, forming a critical supplement to our country's existing natural gas production; therefore continuous attention needs to be paid to them.
Managers' quarterly bonuses -- a critical supplement for many, given average salaries in the mid- to high-$30,000s -- hinge on their ability to keep stores profitable on thin margins.
To our knowledge, this is the first assay that is capable of evaluating complement activation mediated by Ficolin-3 and down stream components and thus will provide a critical supplement to the already existing assays for evaluating complement function and genetic defects.
Approaches of social construction in IR are critical supplements rather than denial of neorealist theories highlighting immaterial aspects of IR, such as identities, values, and cultural constitutions for IR (Copeland 2000).
In order to effectively interpret the landscape as represented through LiDAR, it is critical to supplement this data with multiple contextual sources and a more robust theoretical geographic framework.
Part-time and visiting professors are also critical in supplementing the gaps when full-time professors are on needed leave.
Need for immediate help Ms. Farrow also visited UNICEF's warehouse, where boxes of critical nutritional supplements are being prepared for distribution across the entire Kanem region.
Critical intravenous nutritional supplements and oral drugs for controlling diabetes, high blood pressure and attention-deficit hyperactivity disorder are difficult to find, said Cynthia Reilly, the director of practice development at the pharmacists' organization.
New federal funding programs should endow new faculty chairs for early-career scientists in areas of critical scientific need, supplemented by funding from state governments, university endowments, philanthropic foundations, for-profit businesses, and even individual donors.
