ri air show

Today, I drived 1 and half hour to north kingstown, RI to get to the air show. Not mention, on the ground are all the main aircraft used in US military. 3 Carrier, 2 fighters. There are several aircraft in air. chopper, c130, f18(blue bird), f22, f15, f16, A10. At the beginning it's boring. Then a operation simulation is performed and things get interesting. Finally the routine air show, the NAVY F18 Blue Bird is out of their van and that's the ultimate cool.

福建最游处

玉华洞：一是藏禾洞，二是雷公洞，三是果子洞，四是黄泥，五是溪源，六是白云。走2小时。

vim tricks

1. :set filetype=python, for python file and we can figure out the general form.
2. How to insert tab for Makefile when you have expandtab on, use ctrl-V tab in insert mode.

two dimensional input in mathematica

1. move complementary position by pressing Ctrl+5
2. Type fraction by Ctrl+/
3. Type superscript by Ctrl+6
4. Type subscript by Ctrl+-
5. Type overscript by Ctrl+7
6. Type underscript by Ctrl+=
7. Type square root by Ctrl+2
8. Type radicals by square root and moving complementary position.