If the anticipated cost is high, they tune the statement and the physical design of the database to reduce its anticipated cost, often by adding an index.
如果预期成本很高，他们会调整语句和数据库的物理设计(常常会添加索引)，从而降低预期成本。
2
Last month, Standard chartered-based in Britain but with a large footprint in asia-issued a trading statement that warned of cost pressures related to "increasing competition for staff".