【英语时差8,16】寒冷的脚和温暖的翅膀（下）

Finally, it can sit down and cover all the bases. Many birds are able to control the amount of blood flow through their legs, which increases their ability to regulate temperature. The only danger comes in standing¹ around on a cold day: with one foot tucked up and blood flow greatly reduced to the other, there is a possibility that the exposed leg will freeze. This can be countered by staying in a nest or, in aquatic² birds, by going into the water. As long as the water is in a liquid state, the bird legs floating in it can’t freeze.

1 standing   

n.持续，地位；adj.永久的，不动的，直立的，不流动的

参考例句：

• After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
• They're standing out against any change in the law.他们坚决反对对法律做任何修改。

2 aquatic   

adj.水生的，水栖的

参考例句：

• Aquatic sports include swimming and rowing.水上运动包括游泳和划船。
• We visited an aquatic city in Italy.我们在意大利访问过一个水上城市。