# protract ##### 词义 - #词性/vt <贬>拖延（某事物）；延长 ##### 例句 - Good curative effect and sticking to formula dose may protract interval time of being anew in hospital ( P < 0.05 ) . - 疗效好，坚持规则服药可延长再住院间隔时间（P<0.05）。 - IL-2 could protract preserving time of gene vaccine in BALB \/ c mice and the longest time was 30d ; - 猪白介素2真核表达质粒能延长ORF5基因疫苗在被免疫BALB\/c小鼠肌肉中存留时间多达30d； - The struggle would be bitter and protracted . - 斗争将会艰苦而漫长。 ##### 形态 - #形态/word_third protracts - #形态/word_ing protracting - #形态/word_done protracted - #形态/word_past protracted