[yán zhèn yǐ dài]
be prepared to meet the challenge; be in battle array and wait for the arrival of the enemy; be on the alert and combat-ready; be ready in full battle array; get embattled; remain in combat readiness; square one's shoulders; stand [be ready; be prepared] in battle array; stand ready in battle array [formation]
Jack squared his shoulders and entered the game.
杰克严阵以待投入比赛。