箭镞的英文：
a metal arrowhead

metal是什么意思：
n. 金属；金属制品；气质，勇气；重金属摇滚乐
adj. 金属制的

A hammer has a metal head and a wooden or metal handle.
锤子有个金属的头，一个木质的或金属的把柄。

Metals contract in cold weather.
金属在寒冷的天气里收缩。

The lye will eat through the metal.
碱液会腐蚀金属。

railroad tie of metal
铁路金属枕木

The metal buckled in the great heat.
这金属在高温下变形了。

arrowhead是什么意思：
n. 箭头,镞,慈姑;

Arrowheads on the lines indicate the direction in which the tangent is to be drawn
电力线上的箭头表示所要画的切线方向。

A small stone artifact, probably an arrowhead, with a blunt straight edge and a sharpened, crescent - shaped back, especially characteristic of the Mesolithic Age.
新月形石器一个小的石制的人工制造物，可能是个箭头，有钝的直边，尖的新月形背部，尤其是有中石器时代特点的

A hide quiver contained14 arrows, only two of which had feathers and flint arrowheads attached, but these two were broken.
奥兹的兽皮箭筒里有14枝箭，只有两枝装上了羽毛与燧石箭头，但是都折断了。

Along these ditches I turned up some pieces of pottery, all of it broken, and arrowheads, and a very neat, well-finished stone pick-ax.
沿着这些沟渠我挖出了一些陶器，都是碎的，还有箭镞，以及一只非常光滑、磨得很好的石斧。