The phrase "adds to the principle" is correct and usable in written English.
It can be used when discussing how something contributes or enhances a fundamental idea or concept.
Example: "The new research adds to the principle of sustainable development by providing innovative solutions."
Alternatives: "contributes to the principle" or "enhances the principle."
You could add to the principle a clause stipulating that a "sufficient physical cause" is one that's sufficient in virtue of its physical properties (see also §5.4).
Additionally, mainly discussed issues regarding biofuel production such as cultivation of energy crops on contested and/or litigated land, consultation with local communities and small holder integration are added to the principles of the RSB and ISCC.
Suppose one adds to the desert principle the further norm that when a person has less than she deserves, it is morally more valuable to gain an increment of good fortune for that person, the greater the gap between what she has and what she deserves.
This study adds to the literature by investigating these principles in a naturalistic setting.
In his reply, Zermelo remarks that the inability to describe the choices is why the choice principle is in effect an axiom, which has to be added to the other principles.
Deborah Cooper, of the actuarial firm Mercer, warned that adding to the existing principles behind the negotiation of deficit reduction plans might be confusing.
In Sweden, a 2007 survey report from the National Centre for Priority Setting in Health Care suggested that the responsibility principle be added to the current three principles in the Swedish ethical guidelines for priority setting [ 12].
When added to the 109 published principles these brought the total to 112.
Unless Congress grants the Executive the authority to add to the debt, the Treasury in principle will be obligated to stop all payments not covered by existing funds.
Two years later, in 1991, a new National government committed to free-market principles added to the reform mix by giving parents the right to choose which school their children would attend.
We add to this the principle of instructing learners about the why of self-assessment and peer-assessment and the how of implementing these assessment types.
