1. 加长：lengthofrestraint约束层深度 | lengthening加长 | lengtheningstructuraltimber结构木料接长

2. 船身加长法：lengtheningpiece活钩链段 | lengthening船身加长法 | lengthening加长

3. 延長：substring 底層語言理論 | lengthening 延長 | prolonged consonant 延長的輔音;延長的子音

4. 延长,伸长：lengthen symbol || 加长符号 | lengthening || 延长,伸长 | lengthening coefficient || 延伸系数,伸长系数

noun

1. the act of prolonging something

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

Synonym: prolongationprotractionperpetuation