It just disappears.

它消失了。

youdao

We just stick it onto the fridge for a week or two and forget about it as soon as the paper disappears from there.

我们只是把它贴在冰箱上一两个星期，然后等纸从那消失后就忘了它。

youdao

Dinosaurs died out because of an unexpected incident. But wildlife today disappears or is in danger just because humans do harm to it.

恐龙因一次意外事件而灭绝，但是今天的野生动植物却是因为人类的伤害而消失或处在危险中。

youdao

Just do not experiment with delayed gratification because once this escape disappears, it really is extinct.

BBC: Daily deal: Ecuador and the Galapagos