The phrase "dichotomous nature" means something that has two contrasting or opposite aspects or characteristics. It refers to the idea that something can be divided into two distinct parts or categories. Full definition
Here's the bizarre dichotomous nature of my life right now. (attachmentmama.com)
The researchers suggested that when the amoebae happen to release spores «at sites already containing appropriate bacteria, the costs of early feeding cessation are not compensated for, which may account for the dichotomous nature of this farming symbiosis.» (scientificamerican.com)
The fact that Green's film touches upon this dynamic, showing the dichotomous nature of fame in the face of such an event, makes the work far more than a mere Boston Bombing film. (birthmoviesdeath.com)