spearpointsCOCA¹⁷²⁹⁴⁹ 基本例句 na.矛头；先锋；🌏牙轮顶尖；型刀尖；战术直刀原型spearpoint的复数 The prehistoric giants began their precipitous decline nearly 2,000 years before the Clovis people turned stone fragments into sophisticated spearpoints at the end of the last ice age. 史前巨兽的数目就开始锐减的时间，比我们的祖先在冰河时代末期把自己的武器从碎石块换成了比较精致的矛尖要整整早了2000年。 yeeyan