Gb	Eng
俄国于是对土耳其宣战。	Russia thereupon declared war upon Turkey.
一九一七年美国宣战，扭转了对德之战的形势。	The American declaration of war in1917 turned/tipped the scales against Germany.
宪法授予总统宣战权。	The constitution vests the president with the power to declare war.