He could not account for his absence from classes.

你昨天缺课的理由是站不住脚的。

youdao

You have a lame excuse for your absence from classes yesterday.

你昨天缺课的理由是站不住脚的。

youdao

"So," Snape retorted softly, "I'm sure that Professor Burns gave you a signed note to excuse your absence from your classes."

“那么——”斯内普轻轻的回答道，“——我相信博恩斯教授一定为你们缺席上课开了假条了？”

youdao

Another startling trend in the last few decades is the absence of the leadership classes from the military.

FORBES: Bridging Military and Civilian Understanding: What Petraeus Taught Us