To get the hang of sth: to learn how to do something; to acquire an effective technique 掌握了…的要领，了解…的用法,找到了诀窍

To give someone a ring: to telephone someone 打电话给某人

In any case: whatever the fact is; certainly 不管怎么说

In person: personally; in one's physical presence 亲自

To keep posted: to provide up-to-date information 及时报告

To learn the ropes: to learn the basics熟悉某一行业，了解内情

pain in the neck: an annoyance 头痛的事

Piece of cake: very easy 很简单

To round up: to gather people together 聚集，集合

second nature: a behavior that has been practiced for so long, it seems to have been there always第二天性，习性

Your guess is as good as mine: I don't know; I don't know anymore than you do 我也不知道