士兵们将敌人阻挡住,直到援军到达。
The soldiers ___held ___at ___bay the enemy until reinforcements arrived.
她用幽默来抑制自己的焦虑。
She uses humor to ___keep ___at ___bay her anxiety.
定期锻炼有助于预防疾病。
Regular exercise can help ___keep ___at ___bay illnesses.