蜜蜂上哪里去了(2)

英语自学网

去年秋天，高温气候使得美国的养蜂者损失惨重，蜜蜂神秘失踪，它们上哪里去了？Mister Rexroad said the cause of the sudden loss of bees is not clear. The number of honey bees already had fallen before the colony collapse disorder began.
Experts say the varroa mite is at least partly responsible for the earlier decrease in honeybees. The mite is a tiny creature that feed…