Kids are yelling in the playground outside. A paper airplane whizzes overhead.
一群小孩子们在外面的操场上嬉闹着，一架纸飞机从头顶呼啸而过。
Paper airplane flight effect may be related to the presence of tail wing.
纸飞机的飞行效果可能与有无尾翼有关。
Paper airplane flight effect may be related to the mass, size and wing shape.
纸飞机的飞行效果可能与质量、大小、机翼的形状有关。
Paper airplane flight effect may be related to the mass, size and wing shape.
纸飞机的飞行效果可能与质量、大小、机翼的形状有关。
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