The porpoises have not gone away ever since.

从那时起，这些鼠海豚就没有离开过。

youdao

The porpoises have not gone away long since.

从那以后很久了，这些鼠海豚都没有离开过。

youdao

Meanwhile, the big regional problems that confronted America before the Arab awakening have not gone away.

同时，在阿拉伯觉醒之前已经摆在美国面前的重大地区问题还没得到解决。

youdao

This time next year we will not have gone away.

VOA: standard.2009.03.28

The uprisings in oil-producing countries have not gone away, and indeed have become more violent.

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Meanwhile, the big regional problems that confronted America before the Arab awakening have not gone away.

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Moreover, the ethical objections to the use of material from aborted fetuses have not gone away.

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