He travelled on and on; but the farther he went, the denser the wood became, apparently.

他走啊走；但他走得越远，树林就显得越密。

Why, for example, is Mercury so much denser than Earth, Venus and Mars?

例如，水星的密度比地球、金星和火星大吗？

Hardwoods, as their name suggests, tend to be denser and more durable than softwoods.

如名所示，硬木和软木相比密度更大，也更加耐用。

With spectrum tight, big operators say they must build denser networks than they might otherwise.

而由于频谱资源有限，大移动运营商称必须构建更为密集的网络，而他们本来不打算这么做。

As the crowd starts to get denser, it spontaneously organizes itself into what we call rivers.

但当人群开始变得很拥挤，它就会自发地形成我们所说的人流。