astonishing

The young athlete showed astonishing speed during the final lap of the race.

(Chinese) 这位年轻运动员在比赛的最后一圈展现了惊人的速度。

It is astonishing that the ancient temple has remained standing for over two thousand years.

(Chinese) 令人惊讶的是，这座古庙竟然屹立了两千多年。