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即使如此，飞翔肌肉的衰竭，可防止它们再次迁飞。 If so, breakdown of their flight muscles may prevent them reaching their destiny. | ||
当春季来临的时候，它们又开始向北迁飞。 When spring comes, they begin their long journey north. | ||
迁飞阻碍了不同地理种群间的遗传分化。 The migration could hamper more genetic differentiation among different geographic populations. | ||
草地螟是一种兼具迁飞和滞育特性的重要农业害虫。 The beet webworm, Loxostege sticticalis Linnaeus (Lepidoptera: Pyralidae), is a serious pest to farming and stockbreeding in Northern China. | ||
本文综述了昆虫在迁飞过程中对大气物理环境的各种行为反应，用边界层气象学的理论重新审视迁飞种群的时空分布，提出了“边界层顶现象”的概念。 Based on boundary layer meteorology, the temporal and spatial distribution and the behaviour of migrating insects were reviewed, and a concept of 'PBL-top phenomena' was pre sented. | ||
迁飞昆虫以被动的随气流散布方式，获得对环境的主动适应。 Thus, the migratory insect gets the initiative adaptation to the environment by using a passive mode, the dispersion directed by air current. | ||
取食不同品种的水稻对白背飞虱的飞行能力和再迁飞能力有显著影响。 The flight capacity and re_migration potential of WBPH were influenced significantly by the nutritive conditions of the rice varieties. | ||
雷达观测发现粘虫在空中迁飞过程中具有成层现象，并有较强的秋季回迁定向行为，其头部总是朝向西南； Radar observations indicated that the stratification occurred in the course of the Oriental armyworm migration. The moths headed southwest in autumn migration. | ||
公司将总部迁到了斯坦福。 The company relocated its head office to Stanford. | ||
本文分析了1999年各地草地螟主要迁入峰期的天气学背景，并对风场的时空分布及草地螟迁飞轨迹进行了模拟。 We analyzed the weather background during the major immigration period in 1999, and stimulated temporal-spatial dynamics of wind field and migration trajectories of the meadow moth. | ||
