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1.The slippery inside means anything will just slide out, like water.
slide out滑出
He saw sliding out of the gymnasium a few students of Class A .
他看到A班的几个学生溜出了健身房。
2.The technology's co-inventor, Dr David Smith, said every day, millions of litres of ketchup, sauces, paint, gels and creams get stuck to the sides of containers and are thrown away.
throw away扔掉；浪费
Your life is too valuable to throw away.
你的生命非常宝贵，不要随便浪费。
