The phrase "are significantly lacking" is correct and usable in written English.
It can be used to describe a situation where something is insufficient or inadequate in a notable way.
Example: "The resources provided for the project are significantly lacking, which has hindered our progress."
Alternatives: "are greatly deficient" or "are markedly insufficient."
We also used our model to identify ∼1,000 genes that are significantly lacking in functional coding variation in non-ASD samples and are enriched for de novo loss-of-function mutations identified in ASD cases.
Accountability practices have been shown to enhance QI in numerous settings, yet are significantly lacking globally.
Aside from estriol and cortisol, normative data for other salivary steroids during gestation are significantly lacking.
While there have been several studies indicating a possible relationship between HPV and HIV, studies that illustrate a temporal association between HPV-related AGW and HIV acquisition are significantly lacking.
The other parameters such as the pore connectivity term (l) and the degree of anisotropy (k) were significantly lacking data, thus only their relationships with porosity were proposed.
The details of this program were significantly lacking, so it is difficult to interpret this result relative to those of other studies.
May is currently embarking on a nationwide tour to sell her deal to the people, while it appears the real sale needs to happen in Westminster where calculations suggest she is significantly lacking in support to get her bill passed.
Cornwallis began negotiating with the Marathas and the Nizam for their support, since the British forces in India were significantly lacking in cavalry, one of Tipu's strengths.
However, many laboratories worldwide do not have the resources to perform whole genome sequencing, which is expensive – particularly those in subtropical and tropical regions from where such influenza sequence data is significantly lacking.
