他能确定无疑地指出问题的根源。

He can identify with certainty the root of the problem.

通过证据，我们可以确定无疑地得出结论。

Through evidence, we can identify with certainty the conclusion.

经过多次检查，医生确定无疑地诊断出病情。

After multiple tests, the doctor could identify with certainty the illness.

科学家们确定无疑地发现了新物种。

Scientists have identified with certainty a new species.

警察通过指纹确定无疑地确认了嫌疑人。

The police identified with certainty the suspect through fingerprints.

瑶瑶会赢是确定无疑的。

That Yaoyao will win is certain.

我们将迟到是确定无疑的了。

That we shall be late is certain.

比赛将被取消已是确定无疑的了。

That the match will be cancelled is now certain.

这样确定无疑的，生平唯有一次。-《廊桥遗梦》。

This kind of certainty comes but once in a lifetime. -The Bridges of Madison County.

不可靠的朋友比确定无疑的敌人更可怕。

Doubtful friend is worse than a ~ enemy.