The phrase "are lacking behind" is not correct in standard written English.
The correct expression is "are lagging behind."
Example: "Many students are lagging behind in their studies due to the recent changes in the curriculum."
Alternatives: "are falling behind" or "are trailing behind."
Although twenty years older than spruce, European beech is lacking behind in size growth because of its species-specific lower and later-culminating course of growth.
Despite its extensive commercial use the cell biological characterization of this yeast is lacking behind.
"I anticipate that and that has to be the case," said Bonds of his team being ready to go from the first snap, something that was lacking when it fell behind by 14- and 21-point deficits to West Ranch and Paso Robles, respectively, before late rallies fell short.
At the same time, the Mets have also spent considerable time trying to see if they can trade Dickey in exchange for at least two young players, mindful that their current roster lacks even one everyday outfielder and is lacking in talent behind the plate.
Masters and Johnson documented the sexual response cycle, which has four phases and is still the clinically accepted definition of the human orgasm, but knowledge of the measurement of physiologic parameters of sexual function in women is lacking "and far behind that in men".
However, a fundamental understanding of the reasons behind this improvement is lacking and this paper aims at filling these gaps.
However, a clear understanding behind this observation is lacking.
As far as we know, this has not been described before in the literature, and a clear rationale behind this phenomenon is lacking.
1 However, the regulatory guidances and industry recommendations for E-R are still lacking behind more mature areas such as population pharmacokinetic (PK) and pharmacokinetic/pharmacodynamic (PK/PD) modeling analyses.
It is still lacking behind analysis tools used in the industry to model phenomena such as elasticity, flow, heat and electromagnetism, but the potential of musculoskeletal modeling is no less than the revolution caused by other simulation technologies.
