名词伸长，制图，延长

1. 伸长：protractile 伸出的 | protraction 伸长 | protractor 量角器

2. 前伸：protracted labor 滞产 | protraction 前伸 | protrusion 伸出

3. 延长;伸展;拖长;绘制：protracted 延长的 | protraction 延长;伸展;拖长;绘制 | protractor 量角器

4. 延長;製圖：原型反應器 prototype reactor | 延長;製圖 protraction | 延長劑量 protraction dose

noun

1. the act of prolonging something

e.g. there was an indefinite prolongation of the peace talks

Synonym: prolongationperpetuationlengthening

2. the consequence of being lengthened in duration

Synonym: lengthinessprolongationcontinuation