на уровне

• The cold water cistern is fixed at a high level.

• Raise the gauge to a height at which the sharp edge of the notch is exactly level with the top of the valve connection.

• The surface of the liquid is flush with the floor of the tunnel.

• Oxygen could have been maintained at a level of about 0.02% of the total composition of the atmosphere.

• For electrons in the same principal level ...

• On the molecular level, diffusion is the result of ...