Aircraft can avoid each other by going up and down, as well as by altering course to left or right.飞机可以通过上下升降和左右移动改变航线来避免相撞。Aircraft can avoid each other by going up and down, as well as by altering course to left or rig...
These effects are antagonizeed by sodium sulfide.这些效果被硫化钠中和了.They'd have a lot of hydrogen sulfide gas bound up in their cells.他们的牢房里有大量的硫化氢气体。The hydrogen sulfide is often blamed for the corrosion.硫化氢常常引起腐蚀....