临时做成 meaning in English

extemporise

He improvised a bookcase out of crates
他用板条箱临时做成书架。
He had been accused in 1994 of revealing state secrets during his research into the lives and deaths of balseros , the people who ? especially in the early 1990s ? fled from cuba on makeshift rafts
1994年他研究偷渡客生活和死亡的研究被控泄露国家机密，偷渡客指90年代初坐着临时做成的筏子离开古巴的人。