"At a quarter past six every morning"和"At about twenty to eight "各是什么意思?谢谢

"At a quarter past six every morning"和"At about twenty to eight "各是什么意思?
谢谢

At a quarter past six every morning
每天上午六点一刻,6:15
At about twenty to eight
大约八点差二十 ,7:40