см. тж. двигаться ~
• Mild steel rings could be ground at 350 pieces per hour .
• The pump delivers this water at the rate of 500 Mcf daily.
• The body is moving with ( or at ) a constant speed ( or velocity ).
• If the molecules are all moving with speed u, ...
• If a plane is moving at 800 km an hour, ...
• The reaction rate is proportional to the rate with which these molecules are formed.