perpetual相关的词根或词缀是: pet

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Investors in singapore recently could buy so-called perpetual bonds through automated teller machines .

新加坡投资者最近可以通过自动售货机购买所谓的永久债券。

Perpetual thrust and parry amongst exchanges has occurred in every major financial jurisdiction .

交易所之间永久的攻守竞争，在所有主要金融辖区都有发生。

Proper democracy is far more than a perpetual ballot process .

合理的民主远非一个永恒的投票程序。

This has led to an almost perpetual questioning of the mba curriculum .

这已引发人们对mba课程几乎无休止的质疑。

Most of sub-saharan africa seems to be sunk in a perpetual drought that has fed a numbing series of civil wars .

撒哈拉沙漠以南的非洲国家似乎陷入永久的干旱，而干旱引发了一系列司空见惯的内战。