For example, all a VFR pilot has to do to enter Class C airspace is establish two-way radio contact with ATC.
例如,VFR 飞行员进入 C 类空域所要做的就是与空中交通管制建立双向无线电联系。
2
Eye contact is one way of measuring the degree of closeness of relationship between two speakers, although there are cultural variations in the meaning of eye contact.