梅氏
Charles Messier (1730-1817), French astronomer who catalogued nebulas and galaxies
没事
it's not important; it's nothing; never mind; to have nothing to do; to be free; to be all right (out of danger or trouble)
美事
a fine thing; a wonderful thing
美食
culinary delicacy; fine food; gourmet food
每时每刻
at all times; at every moment
每时每日
every day and every hour; hourly and daily (idiom)
没事儿
to have spare time; free from work; it's not important; it's nothing; never mind