A fresh egg will sink and an old egg will float.

新鲜鸡蛋会沉下去而不新鲜的会浮在上面。

柯林斯例句

The shell structure of several - year - old egg is different from that of the newborn.

结果表明,两个时期的休眠卵外壳结构有区别,隔年卵外壳较薄,壳纹不明显;新卵外壳厚,壳纹明显.

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