Its history of development may be divided into four stages: formal establishment and early development (1954-1957), zigzag development (1957-1966), great disruption to the system (1966-1976) and restoration and further improvement (1976 to now).
After reviewing the developing process of the socialist theory and the tortuous experience of socialist practice in the late Soviet Union and in China, the article demonstrates that the exact historic position is very important both to the socialist revolution and to the socialist construction.
This article presents a brief review of the above historical period and meanwhile makes an analysis and exposition of the present situation of China-Vietnam relations, which, in my view, are on a rational, pragmatic and stable way of development step by step after a tortuous experience.
The history of the stability of short wavelength modes, such as MHD instabilities and drift waves, has been a long and tortuous one as increasingly realistic representations of the equilibrium magnetic geometry have been introduced.
???Intracoronary entrapment is a rare but potentially dangerous complication during coronary interventions, every cardiologist should be aware of, especially when treating tortuous vessels.
To allow diagnostic quality MR coronary angiography, precise and reliable visualization of small tortuous vessels moving at fast speed is necessary.
Blood supply of anterior and middle cerebral arteries was provided by communication between a tortuous megadolichobasilar artery and the circle of Willis through enlarged posterior communicating arteries.
The normalized permeability also showed a systematic degradation with increasing clay content, which agrees well with the prediction based on the tortuous path model.