Some times I read a sentence finished in sarcastic way with "lol" what is this expression? gosh I donot understand it.

"How come" is exactly the way of saying "why?" or "what for?"

If people are really too close can I say "they are sit cheek-by- jowl"

"sleek" is a common use word? Can I say this accent is really sleek? Can I say Sleek people or person? do you have a synonimous?

Can someone explain to me the expression: "Trickling through to street level" It doesn't make me sense!

This expression is kind of difficult: "that yields a fascinating glimpse":

What does this expression means " every now and again? "When can I properly use it

Thank you ever so much!!

how come
then with
now and again

lol laughing out loud

Trickling through to street level Flowing, running, pouring in a small stream or drops to the street level (water, etc).

that yields a fascinating glimpse that gives a great look/view into something

sleek look into a dictionary
he's a sleek guy, yes, you can say that, but be careful a bit

Students: We have free audio pronunciation exercises.
LOL is one of many shorthand terms used first by chatters and now by those who text message or email a lot.
"How come?" is a poor way of saying "Why?"
"What for?" asks a slightly different question:

Can I borrow ten dollars?
Why? (or "How come") -- why do you need my money? (Maybe, because I'm hungry?)

Can I borrow ten dollars?
What for? -- What are you going to buy? (I am going to buy a burger and Coke.)

If people are close they are "cheek-to-cheek" -- and I wouldn't say they are "too close" in this case because it's usually in a romantic way.
I suppose you could say "jowl-to-jowl," but that's not a phrase I hear in American English.

Sleek means smooth or glossy (you can use www.dictionary.com to find definitions, and from there can click on thesarus to find synonyms)
Synonyms: glassy , glistening , glossy , lustrous , polished , satin , shiny , silken , silky

Trickling through to street level is not a phrase I'm completely familiar with, but a similar saying is trickling down to the bottom or bottom floor so I guess that's nearly the same thing.

Imagine pouring a large barrel full of water on the roof of a four-floor building. the water would come through the roof of the fourth floor quite heavily, would trickle less to the third, even less to the second and may only be drops to the first. That is literally what it would mean.

But the phrase is often used as a metaphor to mean, for example, that the wealth in a society is in the hands of the rich and only trickles down to the poor (being caught along the way by the middle classes).

"That yields a fascinating glimpse." Really this isn't too tough. Imagine that you are walking down the hallway of a hotel and don't know a thing about any of the occupants of the rooms. Then one door opens just for a second and you see people in fancy clothes drinking and smoking and laughing, then the door closes again. You have just seen a fascinating glimpse into that room.

This phrase is also used when, for example, a child writes an essay and includes details about his or her homelife -- that it is very scary at the home, that the parents are rarely there, that the big brother is cruel. This offers a "fascinating glimpse" into the child's life at home. You can't see the whole life because you aren't there, but you got a glimpse through the essay.

Every now and again is a term I usually only hear from older Americans, though I'm not sure what that means. I associate it in my mind with less than modern speech.

You would say it in sentences like this:

How often do I go to the movies? Oh, every now and again. Which means you go once in a while, not really on a set schedule.
I see her every now and again. Which, again, means you see her occasionally.

You don't ever have to use the phrase -- just say "once in a while" (where a "while" means a period of time of unspecified length but not tooooooo long -- probably weeks not years.) Or you could say "I see her occasionally" which means the same thing.

Good luck!

Thak you very, very much..for replying my questions. Your reply is really, really clear, and thank you for your time.:-D or Emotion: big smile

Your friend,

Another meaning of LOL is "Lots of laughs"

Site Hint: Check out our list of pronunciation videos.