Biologists at the University of washing-ton observed the behavior of paper wasps (Mischocyttarus mastigorphorus) in the Costa Rican rain forest and then measured the size of their brains.
华盛顿大学的生物学家观察了哥斯达黎加热带雨林中的一种黄蜂(mischocyttarus mastigorphorus)的行为,并测量了它们大脑的大小。
Rail’s share of the freight market, measured in ton-miles, has risen steadily to 43%—about the highest in any rich country.
铁路在货运市场上的份额,以英里吨数计算,稳步上升到43%——与任何富裕的国家相比都处于最高水平。
Rail's share of the freight market, measured in ton-miles, has risen steadily to 43%-about the highest in any rich country.
铁路在货运市场上的份额,以英里吨数计算,稳步上升到43%——与任何富裕的国家相比都处于最高水平。
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