skepticism|scepticism
她对这种减肥产品的效果持怀疑态度，决定先看看用户评价。
Her ___skepticism about the weight-loss product led her to check customer reviews first.
她对这个新产品的效果持怀疑态度。
She expressed ___scepticism about the effectiveness of the new product.
科学方法中的怀疑论促使我们对所有假设保持谨慎态度。
The ___skepticism in scientific methods encourages us to be cautious about all hypotheses.
他对这个投资计划持怀疑态度，认为收益被夸大了。
He showed ___skepticism toward the investment plan, believing the returns were exaggerated.
怀疑论者认为人类无法获得绝对确定的知识。
___Scepticism holds that humans cannot attain absolutely certain knowledge.
他的怀疑态度使他质疑这项新科学发现的真实性。
His ___scepticism made him doubt the validity of the new scientific discovery.