// Do some periodic background work while `future1` is running.
本条规定仅在海上拖航合同没有约定或者没有不同约定时适用。，这一点在爱思助手中也有详细论述
Dead Man Walking，这一点在PDF资料中也有详细论述
Good morning. What will life be like in 2040? Pretty awesome, according to famed Silicon Valley investor Vinod Khosla.，更多细节参见PDF资料