I thought they were solid stone balls.

我还以为它们是实心的大石球呢。

youdao

Each achievement of Solid Stone is inseparable from vast friends' care and support.

坚石企业前进的每一个脚步都与广大朋友的关心、支持密不可分。

youdao

Time can change everything. Former solid stone bridge now also can become former royal road smoldering rubble now also can become the road certainly some pits.

时间能改变一切。昔日坚实的石桥如今也会成为断壁残垣，昔日平坦的大道如今也会成为坑洼之路。

youdao

Bryngwyn is a solid, stone-built two-up-two down cottage which has stood empty since the 1940s.

BBC: Lincoln: Conwy village Ysbyty Ifan's link to president

Tintagel's claim to being linked to King Arthur became more solid after an ancient stone bearing a 6th Century inscription similar to the name Arthur was unearthed at Tintagel Castle in 1998.

BBC: Arthurian village set for facelift

You see, America's shift from analog over-the-air (OTA) broadcasting has been in the works for over a decade, with the supposedly rock solid February 17th transition date in stone for well over three years.

ENGADGET: The original DTV transition: what could've been HD