生物学家休·丁格尔已经识别出五个特征,这些特征在不同程度和组合上适用于所有的迁徙。
The biologist Hugh Dingle has identified five characteristics that apply, in varying degrees and combinations, to all migrations.
北美五大湖,也就是苏必利尔湖、密歇根湖、休伦湖、伊利湖和安大略湖,它们的停留时间分别是190年、100年、22年、2.5年和6年。
The residence times for the Great Lakes of North America, namely, Lakes Superior, Michigan, Huron, Erie, and Ontario, are, respectively, 190, 100, 22, 2.5, and 6 years.
报告显示,年过55的人有四分之一在过去的五年内曾经休过“空档年”,或正计划要去。
One in four over-55s has either been on a gap year in the last five years or is planning to take one, according to a report.
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