essential component造句怎么写

Although factory overhead normally cannot be identified with the individual jobs, it is an essential component of manufacturing costs.

Laboratory fume cupboards constitute an essential component for any laboratory, it can exhaust the harmful gas, particle, then protect the safety of staff in the lab.

serving as an essential component.

Today, choreography is an essential component of many performing arts.

fibroin:an insoluble white protein that is the essential component of raw silk and spider-web filaments.

a colorless crystalline amino acid that occurs in the hydrolysates of certain proteins; an essential component of human nutrition.

Research reveals that personnel performance is closely related to motivation; thus keeping personnel motivated is an essential component of good management.

Besides, less plastic means using less oil, the essential component in plastic and a nonrenewable resource.

Ceramic rollers are used in various types of roller kilns as an essential component for supporting and transporting semi-finished products fired at high temperature.

An insoluble white protein that is the essential component of raw silk and spider-web filaments.

Extracurricular activity is an essential component in school life.