2. Although he was experienced, he was not infallible. 尽管他经验丰富,却并非不会出错。
3. Public schools are often viewed as infallible sacred cows. 公立学校常被认为是批评的禁区。
4. Laughing is an infallible sign of the highest degree of mental development. 笑声必然是智力发展最高程度的标志。
5. The conviction that historical relics provide infallible testimony about the past is rooted in the nineteenth and early twentieth centuries, when science was regarded as objective and value free. 19世纪和20世纪初,人们确信历史遗迹可以为过去提供可靠证明,而在当时,科学被视为客观的和毫无价值的。