As this new science of habit has emerged, controversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods.
随着习惯这一新科学的出现，当这些策略被用来推销有疑问的美容霜或不健康食品时，争议也随之爆发。
questionable.
可疑的。
Its criteria are questionable.
它的标准存在问题。
Its effects are questionable.
其效果存在疑问。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。