1. There´s not much sustenance in a glass of orange squash.
    一杯橙汁饮料没有什么营养.

2. The currents of air that the walls of the ship direct upwards, as well as in the line of its course, are enough to give the great bird with its immense wings sufficient sustenance and progress.
    沿船体的上升的气流和沿航线向前的气流给这种巨翼大鸟以足够的浮力和推力。

3. Not only the means of sustenance,
    这不仅是谋生的手段，