美国空军准备购买100多架涡轮螺旋桨飞机，海军现在正评估巴西航空工业公司的“超级巨嘴鸟”。

The American air force plans to buy more than 100 turboprops and the navy is now evaluating the Super Tucano, made by Embraer, a Brazilian firm.

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美国空军计划购买100多架涡轮螺旋桨飞机，海军目前正在对巴西航空工业公司研制的“超级巨嘴鸟”(Super Tu cano)飞机做出评估。

America's air force plans to buy more than 100 turboprops and the navy is evaluating the Super Tucano, made by Embraer of Brazil.

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已经灭绝了6500万年之久的菊石是一种带有多室螺旋状外壳的海洋头足类动物，其小室之间的阻隔即缝合线就是一种复杂的分形曲线。

Extinct for 65 million years, ammonites were Marine cephalopods that built chambered spiral shells. The walls between these Chambers, called sutures, were complex fractal curves.

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