我觉得没有必要搞那么清楚他们有什么区别, 搞不清楚时可查词典看具体例句.
最重要的是语感. 看多了后想都不用想就知用哪个合适.
Just
Honorable and fair in one's dealings and actions:
正派的,公正的：行为举止正派,公平的：
a just ruler.See Synonyms at fair 1
公正的统治者参见 fair1
Consistent with what is morally right; righteous:
正义的：在道义上坚持合法的；正当的：
a just cause.
正义的事业
Properly due or merited:
应得的：
just deserts.
应得的奖赏
Law Valid within the law; lawful:
【法律】 合法的：在法律范围内有效的；依法的：
just claims.
合法的要求
Suitable or proper in nature; fitting:
恰当的：根本上适合的或适宜的；相称的：
a just touch of solemnity.
适度的庄重
Based on fact or sound reason; well-founded:
有充分根据的：以事实或合理的缘由为基础的；理由充足的：
a just appraisal.
有根有据的评价
adv.（副词）
AHD:[j…st, j¹st] [j¾st ] 重读时
Precisely; exactly:
精确地；正好,恰恰正是：
just enough salt.
正好足够的盐
Only a moment ago:
刚才,方才：
He just arrived.
他刚刚到达
By a narrow margin; barely:
勉强地,差一点就不：
just missed being hit; just caught the bus before it pulled away.
差点被击中；及时搭上即将启动的公共汽车
At a little distance:
距离不远地：
just down the road.
就在马路那头
Merely; only:
只,仅仅：
just a scratch.
只是一道刮痕
Simply; certainly:
完全地,简直：
It's just beautiful!
简直太漂亮了!
Perhaps; possibly:
也许,可能：
I just may go.
我可能会走
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right
右面的; 右派的
(指行为等)正当的; 合法的; 应该的
正确的; 令人满意的, 真实的
最合适的; (就情况等而言)最好的, 可取的
健康的; 神智清楚的
笔直的; 直角 的
(人、性格)正直的; [美]同情的, 有好意的
(布的)正面的
You were right in deciding not to go.
你决定不去是正当的.
What's the right time?
现在准确的时间是几点?
Have you got the right [exact] fare?
你有正好的钱付车费吗?
He is the right man for the job.
他是担任这份工作最合适的人选.
Learn to say the right at the right time.
学习在适当的时候说适当的话.
Do you feel all right?
你感觉一切都好吗(就身体而言)?