Brazil's middle class is swelling: at the last count there were 97m people in marketing bracket "c", which means they are rich enough to contemplate getting on an aeroplane.
Clouds bracket the edges of the scene, but the dark blue waters of the Atlantic Ocean show in the middle, and above them, a rippling, brownish-yellow river of ash.
云层围绕着图像边缘，而在中部，大西洋深蓝色的海水映出了这股波纹状，有点像棕黄色河流的火山灰。
3
There is standard bolt hole connecting with the valve or bracket. The output axis in the middle is a standard internal octagon.