Obstructiveness
n. 妨害;阻碍
🗣️ 情景例句
Please sit down, Alexandra.
请坐 ，Alexandra。
All the neighbors helped us move in.
邻居们都帮忙为我们搬家。
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。