Ww digital marketing operations director , lenovo .

联想ww数字营销运营主管

After ww ii , soviet union economy is basically in the yearly progressive decrease .

苏联的经济增长二战之后基本在逐年递减。

During world war I and ww ii , the u. s.military enlisted more than 2 00000 pigeons to conduct surveillance and relay messages .

在第一次世界大战和第二次世界大战期间，美军征募了超过20万只鸽子用于实施监测和转达信息。