求翻译：While research has pinpointed that low levels of dopamine cause Parkinson's, the trigger that causes dopamine levels to fall is still a mystery.是什么意思？

待解决

悬赏分：1 - 离问题结束还有

While research has pinpointed that low levels of dopamine cause Parkinson's, the trigger that causes dopamine levels to fall is still a mystery.

问题补充：

匿名	2013-05-23 12:21:38 同时研究针对多巴胺引起帕金森氏导致多巴胺水平下降，触发水平低，仍是一个谜。

匿名	2013-05-23 12:23:18 Research has pinpointed While that cause low levels of dopamine, Parkinson ' s the trigger that causes dopamine levels to fall is still a mystery.

匿名	2013-05-23 12:24:58 While research has pinpointed that low levels of dopamine cause Parkinson's, the trigger that causes dopamine levels to fall is still a mystery.

匿名	2013-05-23 12:26:38 While research has pinpointed that low levels of dopamine cause Parkinson's, the trigger that causes dopamine levels to fall is still a mystery.

匿名	2013-05-23 12:28:18 正在翻译，请等待...

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