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1. We all know that fats spoil by becoming rancid.

我们都知道油脂变质后会发臭。

2. Mobutu ascended through the ranks, eventually becoming commander of the army.

蒙博托出身行伍，通过一级级晋升，最终成为了陆军司令。

3. We are becoming one of the market leaders in the fashion industry.

我们正在成为时装业的领军者之一。

4. All the nice areas in Florida are becoming more and more urbanized.

佛罗里达所有的那些好去处都在变得越来越都市化。

5. She has some cockeyed delusions about becoming a pop star.

她还幻想着自己能成为流行歌星。