Employing Freud psychoanalytic personality,the paper,from three-level personality structure and death instinct,thoroughly and deeply dissects the causes of protagonist s insanity and reveals the rationality of his tragedy,and social significance of Edgar Allan Poe s The Tell-tale Heart.

This paper attempts to analyze the discourse features of Edgar Allan Poe s short story The tell-tale heart from the Systemic-Functional Approach.

So,being the basic element of the civil act of law,declaration of will plays a more and more role.

The characteristics of electronic declaration of will in electronic contract are introduced,as well as the impact of it upon the relevant systems of traditional contract law.

The author,based on the concept of civil justice act,proposes that legalization shall not be the necessary element of civil justice act while the emphasis should be placed on the declaration of will in legal acts as well as the pursuit of effects in private law.

Research on the Theory of Reliance Protection and Declaration of Intention Explanation;

As the core of the system of legal acts,declaration of intention is the basis of the effectiveness of legal acts,also the base point of the estimation of the value of the legal acts.

The conception of juristic act must include its core factor declaration of intention and therefore should be emphasized that it brings about private law effect,not as a kind of juristic fact,but as a kind o.