严格来说,两个词是完全不同的.
just 作副词用时,“仅仅”这个含义用的更多,“恰恰”用的很少,如“That's just what I want.”那恰好是我想要的.
right 作副词用时,译成“正好”更准确,“It's right in front of you.就在你前面”“He was standing right in the middle of the lawn.他站在草坪的正中央”