Certain discomforts are incidental to the joys of camping out.

享受露营的快乐时, 难免也会有些不便之处.

Profit and loss are incidental to life, and surely there is enough for us all.

得失是人生的偶然， 当然足够我们大家了。

The latter is incidental to individual differences, whereas the essential phenomenon is that which occurs in the simplest case.

后者是个体差异的附带现象， 而本质现象是发生在最简单情况下的现象。