trial and error
['traɪəl ænd 'erə]
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| 反复试验,不断摸索 |
参考例句:
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- 1. But engineering a crop takes a lot of trial and error.但是对于基因工程庄稼已做了大量的反复试验。
- 2. They didn't know how to put in a central heating system,but they managed it by trial and error.他们不知道怎样安装集中供暖设备,但是经过反复试验终于安装好了。
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