CA: Thirty percent a year. MS: But then beekeepers are able to divide their colonies and so they can maintain the same number, they can recuperate some of their loss.
CA：每年30%。 MS：但是那时养蜂人会把他们的蜂巢分出来。 这样他们可以维持同样的数量， 他们可以弥补一些损失。