因为人口控制的支持者推行计划的方式引起了严重的质疑。
For the way the proponents of population control have gone about pushing their programs raises serious doubts.
某些团体甚至质疑免疫接种的用途，尽管它对控制疾病仍然是很重要的。
Certain groups have even questioned the utility of vaccination, in spite of its ongoing necessity to control disease.
波兰还有它特别的原因，存在是否能控制预算赤字的质疑，以及担心它把低通胀归因为兹罗提的升值（这不在ERM-2的范围内）。
Poland, for its part, failed to qualify because of doubts that it could control its budget deficit and worries that it owed its low inflation to the rise in the zloty (which was not in ERM-2).
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