So the problems of bees today isn't necessarily something new. It has been happening since over a thousand years ago, but what we don't really notice are these problems in cities.
所以现在蜜蜂所出现的问题也不是什么 新鲜问题，以前年前 就已经发生这样的问题了， 但是我们在城市里并没有发现这样的问题。