differential sign

Clinic symptom and sign are nonspecific in viral pneumonia, Legionnaires pneumonia and mycoplasmal pneumoniae, also WBC and chest X-ray, differential diagnosis rely on microbiological diagnosis.

病毒性肺炎、军团菌肺炎及肺炎支原体肺炎的临床症状、体征、外周血白细胞、胸部影像均无特异性，其鉴别须靠病原微生物检查。

In the stability theory of ordinary differential equations, the V-function of Liapunov fundamental theorem of stability is a fixed sign and its total derivative is contrary sign to V-fuction.

在常微分方程稳定性理论中，Liapunov稳定性基本定理中的V函数是一个定号函数，且它关于时间t的全导数dV/dt的正负号要求与V相反。

CONCLUSIONS Abscess is an important symptom and sign of thoracic spine tuberculosis. Its shape, size and tracking site are related to the anatomical structure, physiological function, surrounding tissue and severity of disease and also are important for differential diagnosis.

结论脓肿是胸椎结核的一大临床症状和体征，其形态、大小和流注部位与胸椎的解剖结构、生理功能、周围组织和病情的轻重紧密相关；

Relationship between polymorphism and differential expression of DC-SIGN and susceptibility of human to infection diseases

DC-SIGN基因多态性及表达差异与宿主易感性之间的关系

Conclusion The characteristic color comet tail sign can be used to make Up the inadequacy of B-mode sonography and improve the accuracy rate in the Diagnosis and differential Diagnosis between the Calculus of urethroprostatic part and other high echo lesions in the prostate such as Prostatic calculus or calcification.

结论尿道前列腺部结石周边或后方的五彩镶嵌彩色多普勒信号的特异性征象，有确诊价值，弥补了B超诊断的不足，与前列腺强回声病灶具有鉴别诊断意义。