[with obj.]extend the duration of 延长,拖长 an idea which prolonged the life of the engine by many years. 延长了引擎寿命多年的想法。 ■(一般作 be prolonged)(rare)extend in spatial length (罕)延长 the line of his lips was prolonged in a short red scar. 短短一道红色疤痕使他的唇线显得很长。
派生 prolongation noun prolonger noun 语源
late Middle English: from Old French prolonguer, from late Latin prolongare, from pro- 'forward, onward' + longus 'long'