りょうこくかんけいがおもみをます【両国関係が重みを増す】
Relations between the two countries will increase in importance.
りょうこくかんけいのあっか【両国関係の悪化】
deterioration of (bilateral) relations between the two countries
りょうこくかんけいのきばん【両国関係の基盤】
the foundation of the relationship between the two countries
りょうこくかんけいのれいきゃくか【両国関係の冷却化】
a cooling off in bilateral relations
りょうこくかんけいはきんちょうのきょくにある【両国関係は緊張の極にある】
The tension between the two countries is at its height.;The relationship between the two countries is at the height of tension.
