英语美文:A Sense of a Goose
Whenyouseegeeseflyingalongin"V"formation,youmightconsiderwhatsciencehasdiscoveredastowhytheyflythatway.Aseachbirdflapsitswings,itcreatesanupliftforthebirdimmediatelyfollowing.Byflyingin"V"formation,th...
Whenyouseegeeseflyingalongin"V"formation,youmightconsiderwhatsciencehasdiscoveredastowhytheyflythatway.Aseachbirdflapsitswings,itcreatesanupliftforthebirdimmediatelyfollowing.Byflyingin"V"formation,th...