pierce和penetrate的区别？

pierce 多指人为地用刀刺、剑等尖锐东西刺穿或刺入某物
penetrate 较正式用词，可指用任何工具穿入或穿透，也可指光线、声音等透过物体

pierce
[piEs]
vt.
刺穿, 刺破, 穿透, 突破, 深深感动

pierce
pierce
AHD:[pîrs]
D.J.[pi*s]
K.K.[p!rs]
v.（动词）
pierced， pierc.ing， pierc.es
v.tr.（及物动词）
To cut or pass through with or as if with a sharp instrument; stab or penetrate.
刺入，刺穿：用或好象用尖锐工具切入或穿过；刺穿或刺入
To make a hole or opening in; perforate.
穿孔于，打眼于：在…里做一个洞或口子，打孔于
To make a way through:
穿过，突破：
The path pierced the wilderness.
这条路穿过野地
To sound sharply through:
声音冲破：
His shout pierced the din.
他的叫喊冲破了噪音
To succeed in penetrating (something) with the eyes or the intellect:
洞悉，穿透：用目光或洞察力看穿（某事）：
Large glowing yellow eyes pierced the darkness.
一双大而发光的黄眼睛洞悉了黑暗
v.intr.（不及物动词）
To penetrate into or through something:
穿透：穿入或穿过某物：
The rocket pierced through space.
火箭穿过太空

Middle English perce