3 Olduvai Handaxe
a handaxe was the swiss army knife of the stone age
drill 钻头
scrape bark 刮树皮
the cutting edge of technology
percussion 打击乐器
chipped有缺口的 cobbles鹅卵石
knapper 破碎器
dexterity 灵巧
lump 块
leap 飞跃
In a way a sculptor today can see the statue waiting inside the block of stone
neurologically 神经学
skin animals for clothing
strip branches for fire
flourish 繁荣
a gravel砾石 pit坑
elaborate 阐释
silt 淤泥
embedded 嵌入式
sediment 沉淀
