The red dotted line indicates the sea breeze front.

红色虚线显示海风锋的位置。

youdao

And so despite my status as a running refusenik, I found myself herded, among a crowd of far fitter, healthier, sportier types, into a pen behind the start line, part of a sea of red t-shirted runners beneath a threatening gray sky.

CNN: Crossing the Olympic finish line