1.Invited to display it, he lifts a heavy stone slab onto a metal spike in the ground and spins it to a blur with a bamboo stick.
记者邀请他展示一下。他托起一个沉重的石板放在地上的一个金属钉子上，用竹棍使其旋转。
2.a metal spike with a hole for a rope; mountaineers drive it into ice or rock to use as a hold.
有系绳子的孔的金属钉；登山运动员把它楔入冰里或岩石里当作把手。
3.A walking stick tipped with a metal spike.
尖头杖装有金属尖的手杖
4.they heat up this metal spike,
先把一根大钢钉烧热