通信協定

communications protocol

to set / to fix / to determine / to decide / to order

letter / mail / CL:封[feng1] / to trust / to believe / to profess faith in / truthful / confidence / trust / at will / at random

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

to correspond (by letter etc) / to communicate / communication

to cooperate / to harmonize / to help / to assist / to join

agreement / accord / to reach an agreement