关系

He and his wife broke up.

That doesn't concern you at all. / That has nothing to do with you. / That is of no concern of yours.

Scientists believe that certain diseases are directly connected with cigarette smoking.

relations of art to morality; relationship between art and morality

relation/relationship by blood; blood relationship

personal relations

student-faculty/student-instructor/cher-pupil relations

social relationship/connection

family relation; domestic relations

legal/logical relations

be intimately related (to); have close ties (with)

be at daggers (with)

break off (all) relations/connections with sb; discontinue/finish relations/connections with sb

mend/repair relations

hurt/impair relations

dissolve marital connection

establish business/commercial/diplomatic relations/connections/ties (with)

resume relations (with)

cement/consolidate the relations (between)

have sex with sb; sleep with sb

improve/strengthen/intensify relations

develop the relations (between)

encourage/further/facilitate the relations between the two countries

maintain friendly relations

Those details have little bearing upon/on the main issue.

be of no small concern to him; make great difference to him

The match has to be postponed on account of the weather.

Owing to the lack of time, we have to stop here today. / Since time is limited, we have to stop here today.

resign on account of advanced age/feeble health

The prosperity of China bears upon that of all Asian countries.

concern the life-blood of the national economy

involve the interests of the state and the people

Party membership credentials

salary credentials

try to form ties (with sb for personal gains); try to establish underhand relations (with sb for personal gains)