[dà dí dāng qián]
be confronted with [by] a formidable enemy; A formidable enemy stands before...; be faced with a formidable foe; face a formidable enemy; faced with powerful enemies; in the face of archenemies; with a formidable enemy right in front; with dangerous enemy ahead
We must strengthen our unity in the face of powerful enemies.
大敌当前， 我们必须加强团结。