Apparently front teeth changed first, back teeth later.
非常明显，前面的牙齿先改变，后面的牙齿再改变。
The situation at the front has changed greatly.
前线形势已发生了巨大变化。
Today, I was getting changed in front of my room mate of two years.
今天我在室友面前换衣服，我俩已经一起住了两年了。
Today, I was getting changed in front of my room mate of two years.
今天我在室友面前换衣服，我俩已经一起住了两年了。
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