You need a wok with a steaming rack for this; if you don't have one, improvise.

你需要一口带有蒸笼的锅，如果没有就临时凑合一下。

The vet had improvised a harness.

兽医临时凑成了一套马具。

I asked her what the piece was and she said, 'Oh, I'm just improvising.'

我问她那首乐曲是什么，她说，“哦，我只是即兴演奏。”

Uncle Richard read a chapter from the Bible and improvised a prayer.

理查德叔叔吟诵了《圣经》中的一个章节，然后即兴说了一段祷告。