缺乏知识或经验。
因为缺乏知识或经验，我们自己放弃的机会之多，令人叹息。
It's amazing how many opportunities we deny ourselves due to lack of knowledge or experience.
有时这是由于缺乏知识、能力或经商的经验；然而有时则是由于个人的缺点所致。
Sometimes this is due to a lack of knowledge, skill or business experience, and sometimes to personal weakness.
有时这是由于缺乏知识、能力或经商的经验；然而有时则是由于个人的缺点所致。
"Sometimes to personal weakness" is the reduced form of "sometimes this is due to personal weakness".
有时这是由于缺乏知识、能力或经商的经验；然而有时则是由于个人的缺点所致。
"Sometimes to personal weakness" is the reduced form of "sometimes this is due to personal weakness".
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