on top of 是什么意思呀？

on top of (something) 

完全控制某事物、对某物摸得一清二楚

Don't worry, I'm back on top of things now.

不要担心，我现在又完全控制了局面。

I should be more on top of my work next week.

下周我应该会把工作做得更好。

The intro 

(Listening Comprehension)

Hey, what's up, everybody ? Let's start things off with a little joke, shall we ? Here we go :

The owner of a drug store walks in to find a guy leaning heavily against a wall. The owner asks the clerk, "What's with that guy over there by the wall ?" The clerk says, "Well, he came in here this morning to get something for his cough. I couldn't find the cough syrup, so I gave him an entire bottle of laxative." The owner says, "You idiot ! You can't treat a cough with laxatives !" The clerk says, "Oh yeah ? Look at him, he's afraid to cough !"

Haha, did you guys get the joke ? Alright, let's talk about the word of the day which is "on top of something", check it out !

没看懂？请自己查字典！

(这才是真正的学习过程)