不实用性的英文

• impracticability
• unserviceability

• 不:    a block of wood
• 不实用:    unusefulness◇不实用性 unserviceability
• 实用性:    availability; industrial activity; practicability; practical applicability; practicality; serviceability; utility
• 不实用的:    academic; u ractical; uneconomic; unpractical; unserviceable
• 工业实用性:    industrial applicability