that is _____(完全)what I want to know 答案是iust ,但just 是代表完全的意思吗

just在这儿是“正好，恰好”的意思
译：这就是我想知道的。
just1 [dʒʌst]
adj.
1. 正义的，正直的，公平的，公正的
2. 恰当的，适当的，合适的
3. 合理的，有充分根据的，有缘由的
4. 应得的
5. 正确的，精确的，真实的
6. 合法的，法律上认可的
7. [古语]忠实于原文的
adv.
1. 正好，恰好，正要
2. 仅仅，只是；只不过
3. 刚才，方才，刚刚
4. 差一点儿，很不容易
5. 直接，就
6. [口语]真正，实在，非常，绝对
7. 也许，可能
8. 请，试看[常用于祈使句]
9. 将近(常与on连用)
just2 [dʒʌst]
n.,vi.
= joust
just.
abbr.
justice
just [dʒʌst]
adj.
1. used especially of what is legally or ethically right or proper or fitting
a just and lasting peace a kind and just man a just reward his just inheritance
2. implying justice dictated by reason, conscience, and a natural sense of what is fair to all
3. free from favoritism or self-interest or bias or deception; or conforming with established standards or rules
4. of moral excellence
a just cause
adv.
1. and nothing more
just a scratch
2. indicating exactness or preciseness
it was just as he said--the jewel was gone it has just enough salt
3. only a moment ago
he has just arrived the sun just now came out
4. absolutely
I just can't take it anymore he was just grand as Romeo
5. by a small margin
just missed being hit
以上来源于: WordNet

Just这个单词强调的是“正是”,翻译成“那个正是我想知道的”,在某种程度上讲也可以译作“完全”
英文翻译不必非得咬文嚼字,得加上你的情感去翻译,你得知道这句话表达的是什么意思和什么情感.
而这句话强调的是“正是”,表达肯定的意思.