be bound together by ties of fraternal friendship;be close like (/as) brothers; brotherly friendship
? 我們兩國人民幾個世紀以來一直～。Our two peoples have been bound together by ties of fraternal friendship for several decades.
情同手足
be as intimate or affectionate as brothers;regard each other as brothers
情同手足qínɡ tónɡ shǒu zú
形容交情非常深，就像兄弟之間的感情一樣深。be close as brothers, like brothers, be affectionate to each other like brothers