The Source of the "xian gu huai gen chu,guan qing ma gu gao;

It,however,has been uncertain whether the couplet can be traced to some source.

By analyzing on the similarities and differences of the forms and sources of English and Chinese idioms and making a penetrating analysis on the cultural connotation,we can understand and apply the idioms better,remove cultural misunderstanding and enhance transcultural communication ability.

The Evolvement of Provenance Considered by Scholars in the Period Ranging from the Early Qin Dynasty to the Southern and Northern Dynasty;

It is crucially important for researchers especially scientists to judge the correctness and timeliness of data and experiments according to provenance.

Many succeed technologies of wasted sludge treatment and disposal are introduced, the merits and defects of each technology are analyzed.

Then technologies of municipal sewage sludge treatment and disposal and recent studies are expounded.

Addressing on the problems resulting from the traditional processes of sludge treatment and disposal,a literature review on research progress in the physicochemical,biological and other methods of sludge reduction and reutilization was presented;it also fore.

The existing technologies of remediation of organic contaminants are briefly reviewed:pump and treat,air sparging soil vapor extraction,intrinsic bioremediation,flow path management,integrated multicomponent,bioremediation,adsorption,in situ reactive walls.

In this paper the mechanism of pump and treat to remove the organic pollutants in groundwater and to prevent the diffusion of the polluted groundwater is introduced first.