But since they do in the paper world, where free-sheets and paid-for publications coexist, there seems no reason why they wouldn't online.
由于在传统纸媒领域中，报纸也有免费与收费这两种，那么在互联网上，他们的共存也就无可非议了。
2
Evidence that an ice-free corridor between two ice sheets developed when the continental ice first began to melt came primarily from radiocarbon dating.
当大陆上的冰开始融化时，两块冰原之间形成了一条无冰走廊，这一证据主要来自放射性碳测年法。
3
There's no point berating voters for their ignorance: people have bills to pay and children to raise, and most don't spend their free time studying fact sheets.