Lifespans ranged from three years for the mice, to 23 or more for common backyard squirrels.动物寿命从3年(老鼠)到23年甚至更多(普通的庭院松鼠).They've been called Shorts , due to their small stature but also their brief lifespans.根据他们矮小的...
Smoking could lead to irregular heartbeats.吸烟会引起心律失常。Doctors also treat irregular heartbeats with another device called a pacemaker.医生还会使用另外一种称为“心脏起搏器”的设备来治疗心律不齐.A sad and lonely tune. There's only piano and heartbe...