But it's superfluous, really-which is why calling someone a "fifth wheel" is a way of calling them unnecessary, basically a tagalong.
The three girls were inseparable—Kivi and Blomma, blonde and freckled, quiet and assured, and their tagalong, Chavisory, a chatterbox who looked no more than five years old.
不要因为自己不懂“清算优先权”(liquidationpreference)、“优先承购权”(rightoffirst refusal)，或者是“拖带权”(dragalong/tagalong)的含义，而被律师搞的晕头转向。
