The phrase "greatly lacking" is correct and usable in written English.
It is typically used to describe a situation or thing that is significantly or noticeably deficient or insufficient in some way. Here is an example: "The company's training program is greatly lacking in essential components, leading to high turnover rates among employees."
Or that "I felt awkward, unattractive and greatly lacking in confidence".
Generally speaking, the Englishwoman has a suitable dress for every kind of amusement, but as far as bathing goes nothing is too slipshod, nothing too greatly lacking in taste.
Its mineral and petroleum resources and its economic potential were significant, but its performance was greatly lacking by human development measures such as health, education, and the distribution of wealth.
However, what was greatly lacking was a comprehensive resource connecting and indexing existing useful Web sites.
The Shape Memory Alloy, Nickel-Titanium i.e. Nitinol is greatly lacking in published research about its properties.
Therefore, even though Japanese studies have made a contribution to the evaluation of diagnostic accuracy of PET both in Japan and internationally, comprehensive information about PET studies conducted in Japan is greatly lacking.
Yet Australia, she noted, "Greatly lacks a trained and experienced cyber security workforce".
Although several individual reports and reviews have been published on the topic, 16 17 18 19 20 21 they vary greatly and lack sufficient detail (for example, associations for diverse causes of death or primary versus secondary prevention settings).
The amount of ICAM-5 bound to α-actinin greatly decreased when lacking of the cytoplasmic domain (Fig. 3C,F).
This is supported by the fact that CNDAC greatly sensitizes cells lacking key components in this pathway, such as ATM, Rad51D(a Rad51 paralog), and two Rad51-interacting proteins, XRCC3 and BRCA2.
7 Screen-detected populations have a CVD risk profile that is distinct from that of individuals with clinically diagnosed or established diabetes, 8, 9 and evidence to inform the treatment of individuals found earlier in the course of the disease, where CVD risk varies greatly, 8 is lacking.
