He says his interest in native people began in his boyhood when he found an ancient stone arrowhead.

他说他对土著民族的兴趣始于孩童时代发现的一枚古代石制箭镞。

youdao

Only the arrowhead, carved from some milky blue stone, had any color.

只有箭头，是用乳状的蓝宝石雕刻的，发出一些色泽。

youdao

Stone implements included adze, arrowhead and grinder.

石器包括锛、镞、砺石等。

youdao