缩成皱纹的,小园齿状的, 它们的航线上, 下, 和穿过犹他州.Corrugated , crenulated, they course up, down, and across Utah.鲸鱼用它们栉齿状的牙齿来捉浮游生物.Whales use their pectinate teeth to gather plankton....
You want to sniff out these tough areas immediately when you're constructing.当你在搞创作的时候也想立刻就发现那些难做的地方.Is that why they're constructing so many underpasses, overpasses and highways?那就是他们建这么多天桥 、 地下通道和公路的原因 吗 ?......