She often wheels her red chair and scissors around the city to give free haircuts.
她经常推着红椅子和剪刀在城里转悠，给人免费理发。
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What you'll need: a small ball, about the size of a soccer ball; a bath towel; a chair on wheels, like a desk chair; a furniture-free area; some of your favorite dance music; a tall glass of water!
Exploration is made of computation correcting method for parameter effects of free recoil on the ballistics when the wheels of recoil trailer are moving in test.