1. If an actor forgets his words, he has to improvise.
    演员要是忘记台词，那就只好即兴现编。

2. improvise

2. He improvised a bookcase out of crates.
    他用板条箱临时做成书架。

3. If an actor forgets his words, he sometimes improvises.
    如果一个演员忘了台词，他有时临时编造。

4. We improvised a tent out of two blankets and some long poles.
    我们用两条毛毯和几根长竿搭成一个临时帐蓬。

1. improvise的近义词

1. We left the tent poles behind, so we had to improvise.
    我们忘了带帐篷支架，所以只好临时找别的东西凑合。

1. 临时制作,及席作成：evident 明显的 | improvise 临时制作,及席作成 | invidious 招嫉妒,惹人恶感的

2. 临时准备：sellout 客满的演出 | improvise 临时准备 | enthusiast 狂热者

1. 临时做;临时凑成
    If you improvise, you make or do something using whatever you have or without having planned it in advance.

    e.g. You need a wok with a steaming rack for this; if you don''t have one, improvise...
           要做这个，你需要一口带蒸笼篦子的锅,如果没有,就用别的临时凑合一下。
    e.g. The vet had improvised a harness...
           兽医临时凑成了一副马具。

2. 即兴表演;即兴演奏;即兴创作
    When performers improvise, they invent music or words as they play, sing, or speak.

    e.g. I asked her what the piece was and she said, ''Oh, I''m just improvising''...
           我问她那一段是什么音乐,她说：“噢,我只是即兴弹的。”
    e.g. Uncle Richard intoned a chapter from the Bible and improvised a prayer...
           理查德叔叔吟诵了《圣经》中的一章,又即兴作了一段祈祷文。

1. perform without preparation

    e.g. he extemporized a speech at the wedding

    Synonym: improvizead-libextemporizeextemporise

2. manage in a makeshift way
    do with whatever is at hand

    e.g. after the hurricane destroyed our house, we had to improvise for weeks

    Synonym: extemporize