birthday Today is my brithday, one of resolutions in 2014 is make great progress in my english, and find a long-term language parter Come on, guys!

compare and contrast "compare and contrast dependent and independent variables" what's the difference between compare and contrast, my comprehension is: contrast is to compare and find out the difference is that right?

what's the differences among assume，presume and suppose as the title

Mahjongg Mahjongg is a good amusement in china, it is good to intellgence/memory we have day off tomorrow and decide to play Mahjongg,haha

happy beginning of this week we have a day of on January 1st, so it is easy to go through this week, this also make me can't concentrate on working, playing things fill my brain....

introduction for myself I am a 26-years old、chinese boy(man), working as a data analyst, my major when i am in the university is statistics and probability theory, I like sports or doing some incentive things, my favorate sport used to be football, but it changed when i begin to wear glasses, now I usually swim or play badminton. chinese is a country with the largest population in the world and the third largest territory(I learn it from the textbook of middle school), chinese culture is complicated, there are different customs between north and south, east and west, from province to province, city to city, it really need a long time to have a sense about it.