kǎo chá duì / zài / shān jiǎo / de / āo dì / lǐ / fā xiàn / le / jǐ kuài / bǎo cún / wán hǎo / de / yán shí / yàng běn

考察队在山脚的凹地里发现了几块保存完好的岩石样本。

The expedition team found several well-preserved rock samples in a depression at the foot of the mountain.