Question

came in 怎么解释

Mrs. Dursley was thin and blonde and had nearly twice the usual amount of neck,
which came in very useful as she spent so much of her time craning over garden
fences, spying on the neighbors.
这句话中的“came in”用“进来”似乎不能解释，求高人解答===

Answer 1

起作用的意思
大意是：Dursley女士很瘦有一头金发，有着别人两倍长的脖子，这在她花时间把头探过花园栅栏暗中监视邻居时起了作用。
例句：I understand the scheme perfectly，but I don't see where I come in．
翻译：我完全了解这个计划，但是我不知道我能起什么作用。
参考：http://en.eywedu.net/duanyu/421e0064zw_0533.htm

Answer 2

本身有“进入"的意思，这里是不是“进入（一种状态）”或“显得"的意思~