the three periods of the hot season, comprising 初伏chūfú, 中伏zhōngfú, and 末伏mòfú, occurring from mid-July to late August; also used more generally to refer to the entire period from the start of the first period to the end of the last
third period of summer
refers specifically to the last of the three hot periods, 末伏mòfú
triple ambush
(literary) an ambush utilizing three separate groups of hidden soldiers
