unprecedented是什么意思

双语用例

• She took the unprecedented step of revealing the truth about the situation.

• Such an event was unprecedented in the 20th century.

• Unemployment has reached an unprecedented level.

• This situation is unprecedented in 21st-century life.

• Crime has risen on an unprecedented scale.

• This did, however, bias the participants in an unprecedented, at times embarrassing, way.

• Ecosystems are not being maintained, safety factors are ignored, species extinction persists at an unprecedented level, and our very global life-support systems are under threat.

• As a result, vast financial resources were increasingly secured and redeployed to construct military and naval machines of unprecedented size, complexity, and cost.