I mean, if you actually measure the temperature over a period, I mean, the temperature has been measured now pretty carefully for about 50, 60 years, longer than that it's been measured, but in really nice, precise ways, and records have been kept for 50 or 60 years,
Quiero decir, si Ud. realmente mide la temperatura durante un período, Quiero decir, la temperatura ha sido medida ahora bastante cuidadosamente durante 50, 60 años, más que eso ha sido medida, pero en formas realmente bonitas, precisas, y se tiene registros para 50 ó