The phrase 'main explanatory variables' is correct and usable in written English.
You can use it when you are discussing two or more variables that explain or account for certain observations or results being studied. For example, "We examined two main explanatory variables to determine why the fish population was declining - water temperature and contamination levels."
The main explanatory variables for bryophyte diversity at tree-level were the identity of the phorophyte tree species and the mixture type (pure versus mixed).
The wash-off, defined in terms of mobilized mass (g/m2) fits well with both process-based and statistical models, with the runoff volume and rainfall depth being the main explanatory variables.
In both seasons, the same sensors detecting volatile cues were the main explanatory variables of the insect data, being responsible for the separation of A. annua treatments from the others.
The other main explanatory variables are the changes in the net replacement rate, the measure of tax progressivity, the payroll tax rate and the labour market situation.
In terms of the main explanatory variables, the mean values of internal and outward interactions during the first job are 9.003 and 5.786, respectively, in Table 3, which closely follows those of the benchmark model (8.943 and 5.749, respectively).
4The main explanatory variables used in making the weights are: ethnicity, country of origin, education level, marital status, size of area of residence, labor force status, class of worker, household income, owner, household size, family type (lone parent, couple, etc)., province, age group, and sex.
At the plot level, the main explanatory variable was the stand type (pure oak, pure pine and mixed).
Household health status was used as the main explanatory variable.
Our main explanatory variable is the regional unemployment rate in each region.
The main explanatory variable is the state unemployment rate at entry.
Meditation, in turn, influences the estate planning decisions of individuals; therefore, meditation was used as the main explanatory variable.
