1. He had to spell out the plan in detail to persuade the investors.
    为了说服投资人，他不得不把整个计划细细说明清楚。

2. He spelled out the government''s plans in his speech.
    他在演说中把政府的计划详加说明。

1. 详细说明;讲清楚
    If you spell something out, you explain it in detail or in a very clear way.

    e.g. Be assertive and spell out exactly how you feel...
           要自信点儿，把自己的感受讲清楚。
    e.g. How many times do I have to spell it out?
           我要仔仔细细讲多少遍？

2. -> see spell 1

1. orally recite the letters of or give the spelling of

    e.g. How do you spell this word?We had to spell out our names for the police officer

    Synonym: spell

2. make explicit
    specify in detail

    e.g. You should spell out your demands

3. spell fully and without abbreviating

    e.g. Can you spell out your middle name instead of just giving the initial?