「事业线」とは？

双乳中间的阴影线，就是乳沟的意思。传说这条线越深则越旺女人的的事业，所以叫事业线。

ENThe shadow line between the breasts, which means cleavage. Legend has it that the deeper this line is, the more prosperous a woman's career will be, so it is called the career line.