intrude和invade的区别？

intrude（及物动词）
To put or force in inappropriately, especially without invitation, fitness, or permission:
闯入，硬塞，强使：不合时宜地进入或强迫进入，特指未经邀请、不合理、或未经允许：
intruded opinion into a factual report.
将个人意见硬塞在真实的报道中
Geology To thrust (molten rock) into preexisting rock.
【地质学】 侵入：（熔岩）侵入已经存在的岩石中
v.intr.（不及物动词）
To come in rudely or inappropriately; enter as an improper or unwanted element:
侵入，闯入，打扰：粗鲁地或不恰当地进入；作为不正确的或不必要的成分进入：
“The flute would be intruding here like a delicate lady at a club smoker”(Leonard Bernstein)
“长笛在这儿显得突兀，犹如优雅的小姐在老烟枪身边”(伦纳德·伯恩斯坦)

invade（及物动词）
To enter by force in order to conquer or pillage.
侵略：以武力进入以便征服或掠夺
To encroach or intrude on; violate:
侵害：侵占或侵入；侵犯：
“The principal of the trusts could not be invaded without trustee approval”(Barbara Goldsmith)
“未经受托人同意，受托的原则不被侵犯”(芭芭拉·哥尔德史密斯)
To overrun as if by invading; infest:
大批进入：象侵略似的横行于；大批出没于：
“About 1917 the shipworm invaded