具体是什么引发了昨天的暴乱仍然不清楚。

What precisely triggered off yesterday's riot is still unclear.

《柯林斯英汉双解大词典》

直到今天，他是自杀还是被谋杀仍然不清楚。

To this day, it's unclear whether he shot himself or was murdered.

《柯林斯英汉双解大词典》

我们仍然不清楚他在这个问题上的立场。

We still do not know where he stands on the issue.

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