Antonym: unnecessary, chance. Similar words: necessary, recessive, recession, excessive, accessible, processing, concession, go to pieces. Meaning: [nɪ'sesətɪ] 
n. 1. the condition of being essential or indispensable 2. anything indispensable.
n. 1. the condition of being essential or indispensable 2. anything indispensable. 
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151. In the text of Macbeth, the sequential organization of time of Macbeth is broken, which forms the necessity of the tragedy.
152. Objective To investigate the unstable characteristics and necessity of internal fixation for acute posterior dislocation of elbow associated with ulnar coronoid fractures.
153. The thick soya bean soup a daily necessity in Korea.
154. The article discusses the necessity of digital management of exploder warehouse.
155. This paper introduces the necessity of double beam splitting system applicating in polarization interference phase subdivision and the optimized principle of this beam splitting system.
156. The paper analyses the necessity of unified legislation of environment and natural resource protection from two aspects of the theoretical basis and significance.
157. And the results are as follows:(1) According to the theoretical tooth face , the bit shift speed and acceleration expression are analyzed. And the necessity of modification is indicated.
158. We can see the necessity of send some goods on consignment first.
159. The necessity of research and development on super - span structures was described. The form and characteristic of the reticulated mega- structure that met need were introduced.
160. Of necessity they are sited near the coasts or tidal water.
161. There were no new lesions, worsening hydrocephalus, evidence of increased intracranial pressure(sentencedict.com/necessity.html), or necessity for surgical resection or other therapy for subependymal giant-cell astrocytoma.
162. The paper stresses the necessity of considering reaction variation along with blade height.
163. Or in order to prove the rationality and necessity of the capitalist form of society, scholars have tried to make a case for acquisitiveness , competitiveness, and selfishness as innate human traits.
164. That is not only the requirement of the true-life but also the necessity of the social development in China.
165. In this paper, the necessity of rectification of digital aerial image is expounded. The bilinear interpolation is used in the rectification programming.
166. This paper expounds the connotations of the PPM, analyzes on the necessity of carrying out the PPM, and introduces some common methods for the PPM.
167. Actually , the colleague has not spiked a rumour but actually the necessity.
168. This essay is trying to introduce the exemptible system of "stained witness" abroad to discuss the necessity and feasibility of the same system's establishment in China.
More similar words: necessary, recessive, recession, excessive, accessible, processing, concession, go to pieces, excess, access, success, process, incessant, density, obesity, processor, in excess of, adversity, diversity, intensity, curiosity, session, propensity, university, successfully, sensitivity, confession, depression, aggressive, impression.