实验没有做成功英文怎么说

在英文中，当一个实验没有成功时，可以使用以下几种表达方式来描述：

The experiment failed.

例句：We tried to reppcate the results of the previous experiment, but unfortunately the experiment failed.

中文翻译：我们尝试复制之前实验的结果，但不幸的是实验失败了。

The experiment did not yield the expected results.

例句：We expected to see an increase in the rate of photosynthesis, but the experiment did not yield the expected results.

中文翻译：我们期望看到光合作用率的增加，但实验没有得到预期的结果。

The experiment was unsuccessful.

例句：Despite our best efforts, the experiment was unsuccessful.

中文翻译：尽管我们尽了最大努力，但实验还是不成功。

The experiment did not work.

例句：We tried a new approach to the experiment, but unfortunately it did not work.

中文翻译：我们尝试了一种新的实验方法，但不幸的是它没有起作用。

希望这些信息对你有帮助。