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

新鲜鸡蛋会下沉，旧鸡蛋会浮起来。

《柯林斯英汉双解大词典》

An older egg will stand up on one end and if the eggs are REALLY old, they may even float.

不新鲜的鸡蛋将竖立起来，如果鸡蛋确实很不新鲜，它们甚至可以浮动。

youdao

The 25-year-old who uses the nickname "Ah Egg" in her blog, started training as a cadet in 2007.

这位25岁的博客名字叫“阿蛋”的女警官，从2007年开始作为一位学员开始培训。

youdao

As a matter of novelistic accuracy, however, this area was more likely a stand-in for the old-moneyed East Egg in the novel, while the arriviste nouveau riche estate of Gatsby was probably located across Manhasset Bay in Great Neck (West Egg).

BBC: The Great Gatsby��s Gold Coast

Young problem solvers make fuel wood-alternative from bio-waste: Jon Kubricki and Bridget Zarych , both 16-year-old students at Pinelands Eco Regional High School in Little Egg Harbor, New Jersey , are winning team-members of the Siemens We Can Change the World Challenge.

WHITEHOUSE: The White House

Antinori first attracted controversy when he helped a 62-year-old woman have a baby eight years ago by implanting an egg in her womb.

CNN: Team to attempt human cloning