someone very experienced at something
在某事上非常有经验的人 (zai mou shi shang fei chang you jing yan de ren)
"She’s an old hand at managing big events."
"她是管理大型活动的老手。" (ta shi guan li da xing huo dong de lao shou)
you have to work hard to achieve success
Very slowly.
to stay informed or at the same level as something or someon...
something that has both positive and negative consequences
to take on someone's role or responsibility
to open your books and begin studying
