Stall and street vendors are the folk culture of the Chinese cities, when you travel in China, you may be surprised to find that many people set up stands on the street and shout to sell various kinds of goods. The most symbolic representati...英国华人论坛
When smooth airflow separates from your wings they stall, losing most of their lift. If you are lucky the airplane drops like a brick, pitches down, accelerates and starts to fly normally again. If you are not so lucky, one wing stalls, roll...英国华人论坛
Building a Custom Ceramic Tile ShowerThe most important feature in a ceramic tile shower stall is the shower pan. The shower pan channels water to the drain and prevents the shower from leaking. Consequently it is critical that the shower pa...英国华人论坛
INTRODUCTION TO HOW TRADITION SLOWS DOWN IMPROVEMENTSIf It Ain't Broke, Don't Fix ItA motorist asks a farmer for a glass of water. The farmer obliges, using a hand pump to draw water from a well. The pump handle turns close to a board, and t...英国华人论坛