1. Estimation of scurviness of meteorological condition is not efficient.

2. Nature conditions are scurviness in hilly and gully region on northwest loess plateau, which is one of the most serious region in our country.

3. For the scurviness of mining system, the security environment of mining system is focus of people.

4. However, if the inferior conditions such as lack of soil water, severe loess of soil and water, scurviness ecological environment can restrict the sustainable development of seabuckthorn stand?

5. With the development of mechanical machining and airspace technology, solid self-lubricant coating have been widely used for it's unique performance in a scurviness lubricating environment.

6. The salvage ship often carry out salvation operation on the scurviness sae, then cause prodigious risk to the salvation sailors.