We mocked up a new type of airplane.
我们制成一种新式飞机的实物大模型。
Every type of airplane has different safety instructions.
不同类型的飞机都有不同的安全指导。
It has several characteristics that make it the best type of wood for an airplane.
它具有几个特点，使飞机最适合它的类型的木材。
It has several characteristics that make it the best type of wood for an airplane.
它具有几个特点，使飞机最适合它的类型的木材。
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