to balance between two difficult choices or opposing sides
二つの難しい選択肢や対立する側の間でバランスを取る (futatsu no muzukashī sentakushi ya tairitsu suru gawa no aida de baransu o toru)
"The diplomat had to walk a fine line between honesty and tact."
"外交官は誠実と機転の間で微妙な線を歩む必要があった。" (Gaikōkan wa seijitsu to kiten no aida de **bimyōna sen o ayumu** hitsuyō ga atta.)
to establish trading relationships with another country
to do something innovative or pioneering
confident and sure of oneself
to do your share of the work or responsibility
to have a friendly and peaceful relationship
to try something without knowing the result
