He kept the glasses in case his vision should ever become dim.

以防视力下降、两眼昏花,他还带了眼镜，“

耶鲁公开课 - 1945年后的美国小说课程节选

Thank you. Sorry, I've got the wrong glasses on but you're absolutely right, and in case the rest of you didn't hear it, n squared.

我看不清，但你绝对是对的,你们其他人可能没听清,是n的平方。

麻省理工公开课 - 计算机科学及编程导论课程节选