It is possible—if statistically extremely unlikely—that Steel could be born a "short sleeper" with an unusual body clock, says sleep expert Dr. Sophie Bostock.
尽管从统计学上来说极不可能，但斯蒂尔有可能天生是个“短睡眠者”，拥有一个不寻常的生物钟。
2
Almost every Z series of trains is equipped with soft sleeper, soft seat, hard sleeper and hard seat.
几乎所有的Z系列列车都设有软卧、软座、硬卧和硬座。
3
The PID of the sleeper process is passed as a parameter.