Synonym: automatic, inherent, instinctive, natural. Antonym: compulsory. Similar words: simultaneously, respond, sponsor, response, respondent, a bone of contention, correspondent, spouse. Meaning: [spɑn'teɪnɪəs /spɒn-] 
adj. 1. happening or arising without apparent external cause 2. said or done without having been planned or written in advance.
adj. 1. happening or arising without apparent external cause 2. said or done without having been planned or written in advance. 
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211. It is stressed that anagiomyolipoma is the most common cause for spontaneous perinephric renal hemorrhage in China.
212. Bichromatic and trichromatic manipulation of spontaneous emission in a three-level system in A configuration is also investigated.
213. The author thinks that chromosomal abnormality is of importance to causing spontaneous abortion and puts foward a series of proposals on eugenic.
214. The peripheral nerve injury caused by some pathological factors results in pathological chronic pain, such as hyperalgesia, allodynia, and spontaneous pain ect.
215. Spontaneous vaginal birth is accepted as the safest mode of delivery for healthy mothers and low-risk infants.
216. The teaching of eurhythmics should cultivate students' behavioral spontaneous sensation, expressive force and musical accomplishment[sentencedict.com], then effectively achieves the best teaching effect.
217. Nystagmus -- Spontaneous, rapid, rhythmic movement of the eyes occurring on fixation or on ocular movement.
218. At this point cardiac arrest occurred, But spontaneous rhythms returned following external cardiac massage.
219. We can divide the rural cooperative society by the forming type into government's leading and market spontaneous, these two kinds each has pluses and minuses, this text maintained is mixed mode .
220. Objective To establish the analysis method of chorionic trophocyte chromosomes and its application in study of early spontaneous abortion etiology.
221. Are you sure that's automobile spontaneous combustion and not the new Toyota charcoal BBQ?
222. Objective To explore the relationship between chromosome anomaly and spontaneous abortion,[http://sentencedict.com/spontaneous.html] and to provide useful information for genetic counseling and prenatal diagnosis in reproductive clinic.
223. Objective: To investigate whether the tissues of the left ventricular outflow tract in rats had spontaneous rhythmicity or not.
224. Spontaneous heating equipment to electrical stone as the core, and nanometer materials made of biological function with high-tech products.
225. When working face has mechanized support, air leakage quantity is small, velocity is low in goaf, and spontaneous combustion zone is more approach to working face.
226. The intrathirdventrical injection of histamine in lower dose inhibited mainly the spontaneous discharges of the nucleus tractus solitarius (NTS) and caused mainly excitatory responses in larger dose.
227. Objective. To compare uninstrumented compensatory curve spontaneous derotation of the rib hump and lumbar prominence after selective lumbar or thoracic fusions in AIS.
228. The objective of this study was to investigate the effects of tryptophan, flavor and sweetener supplementation on spontaneous feeding behavior and feed intake of weanling piglets.
229. The interfacial reactions enhance the wettability and promote the spontaneous infiltration process.
230. In elective patients with AS, awake fibreoptic intubation offers a higher level of security because it can be applied while maintaining spontaneous breathing.
231. The great scientific debate in universities at that time was "spontaneous generation" of life.
More similar words: simultaneously, respond, sponsor, response, respondent, a bone of contention, correspondent, spouse, espouse, be responsible for, corresponding to, courteous, on the spot, courageous, contain, intangible, container, fantabulous, confrontation, continuous, on the contrary, lane, panel, planet, mundane, keep on, airplane, hurricane, component, opponent.