A healthy tooth percussed with a metal instrument gives a metallic sound.

用金属器械对健康的牙齿作叩诊则发出金属声。

But, at the noise I made, the snake let himself flow easily across the sand like the dying spray of a fountain, and, in no apparent hurry, disappeared, with a light metallic sound, among the stones.

但是，一听到我发出的噪声，蛇却像要消逝的喷泉水柱一样轻易地让自己淹没进沙子里。不慌不忙地，消失于石头中，发出轻轻的金属般的响声。