英汉词典

1. 延长；拉长；拖长
    To prolong something means to make it last longer.

    e.g. Mr Chesler said foreign military aid was prolonging the war...
           切斯勒先生说国外的军事援助拉长了战事。
    e.g. The actual action of the drug can be prolonged significantly.
           这种药物实际起作用的时间可以大大延长。