Does this mean space is shaped like a flat plane, a sphere or a saddle?
是不是这就意味着宇宙的形状就是平面、封闭球体或者马鞍状？
Growing e-book sales and the opportunity for targeted advertising mean space in e-books is ripe for corporate messages.
电子书销售的不断增加，目标性广告的商机都为在电子书中投放公司信息创造了有利条件。
Growing e-book sales and the opportunity for targeted advertising mean space in e-books is ripe for corporate messages.
电子书销售的不断增加，目标性广告的商机都为在电子书中投放公司信息创造了有利条件。
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