测量员使用视距测量法快速估算出河流的宽度。

The surveyor used ___stadia to quickly estimate the width of the river.

古代运动场的跑道通常长约一个斯塔德。

The running track in ancient stadiums was usually one ___stadium long.

这座城市新建的体育场能容纳数万名观众。

The newly built ___stadium in this city can host tens of thousands of spectators.