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初二版
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第657期
SCIENCE STUDY
‘Smart’ carts make safer supermarkets
初二
第657期
作者:teen
Aa
-
+
可以自动刹车的超市购物车。
At the supermarket, you may sometimes see naughty children pushing their shopping carts too fast. They think they are like racecar drivers. And the long, wide supermarket aisles (通道) are their roads. But this can be dangerous.
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