airplane, a machine with wings that flies through the air, model, something that people try to copypeople try to copy, be good at, to do something well, fly, to move through the sky, wing, the part of a bird's body that it uses to fly, flap, to move arms or wings up and down, lift off, to leave the ground and go up into the air, ground, the part of the earth where you stand, bone, the hard part of the body under the skin, thin, having a small space between opposite sides, empty, having nothing inside, inside, the inner part of something, light, not heavy; easy to pick up and carry, tooth, a hard white object inside the mouth, beak, the hard part of a bird's mouth, perfect, having no mistakes

Knowledge 1 Lesson 3

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