We should be united against the common enemy. （我们应该团结起来对抗共同的敌人。）

The new policy is designed to protect consumers against fraud. （新政策旨在保护消费者免受欺诈。）

She leaned against the wall, looking tired. （她靠在墙上，看起来很疲惫。）

They are fighting against injustice in society. （他们在与社会中的不公作斗争。）

Put on your coat to guard against the cold. （穿上外套以防感冒。）

The athlete trained hard against the upcoming competition. （这位运动员为即将到来的比赛刻苦训练。）

The law is there to safeguard citizens against harm. （法律的存在是为了保护公民免受伤害。）

He voted against the proposal at the meeting. （他在会议上投票反对这项提议。）

The ship sailed against the strong wind. （这艘船逆风航行。）

We must take measures against environmental pollution. （我们必须采取措施应对环境污染。）

Her opinion goes against what we originally thought. （她的观点与我们最初的想法相悖。）

The soldiers stood firm against the enemy's attack. （士兵们坚决抵抗敌人的进攻。）

Use sunscreen to protect your skin against the sun's rays. （使用防晒霜来保护你的皮肤免受阳光照射。）

They built a dam against floods. （他们建造了一座防洪大坝。）

The committee decided against changing the rules. （委员会决定反对改变规则。）

The boxer prepared himself mentally against his opponent. （这位拳击手在心理上为对抗对手做好了准备。）

We should be on guard against potential dangers. （我们应该警惕潜在的危险。）

The tree branches swayed gently against the blue sky. （树枝在蓝天的映衬下轻轻摇曳。）

She struggled against the current to reach the shore. （她逆着水流奋力游向岸边。）

Parents should educate their children against drug use. （父母应该教育孩子远离毒品。

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