It's in London.

　　科学家用一条假想的线把地球分成东、西两个半球。

　　The line passes through Greenwich in London.

　　在本初子午线穿过格林尼治的地方，有一条镶嵌在大理石中间的铜线，代表本初子午线的一部分。

　　Standing east of the line， you are in the eastern half of the world.Standing on the other side， you are in thewestern half of the world.

　　It is the Home of Time.

　　世界上所有的钟表都是根据格林尼治时间来对时的。

　　Set your watch at the home of time，then stand on both side of the world at once！