英汉词典

1. 不充分的;不足的;缺乏的
    Something that is insufficient is not large enough in amount or degree for a particular purpose.

    e.g. He decided there was insufficient evidence to justify criminal proceedings...
           他认定证据不充分无法提起刑事诉讼。
    e.g. These efforts were insufficient to contain the burgeoning crisis.
           这些努力不足以抑制迅速扩散的危机。