They can keep a record of all of the important dates
他们可以记录下重要的日子。
My brother wants to learn how to play the piano.
我的兄弟要去学弹钢琴。
But can we blame those who looked and failed to see what Galileo saw, if we remember that to use a telescope at the limit of its powers calls for long experience and intimate familiarity with one's instrument?