to speak; to say; a theory (usually in compounds such as 日心说 heliocentric theory)[cedict]
过
guòㄍㄨㄛˋ
(experienced action marker); to cross; to go over; to pass (time); to celebrate (a holiday); to live; to get along; excessively; too-; surname Guo[cedict]
知彼知己
zhī bǐ zhī jǐㄓ ㄅㄧˇ ㄓ ㄐㄧˇ
to know the enemy and know oneself (成语 saw, from Sunzi's Art of War)[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
作战
zuò zhànㄗㄨㄛˋ ㄓㄢˋ
combat; to fight[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]