They could soon face a further threat if warmer summers and milder winters encourage the spread of the Asian hornet, which preys on bees.
如果更温暖的夏季和更温和的冬季促使捕食蜜蜂的亚洲大黄蜂的散布，它们可能很快就会面临进一步的威胁。
3
Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was milder than today's.