brush against 触到，擦及
He felt her hair brush against his shoulder.
他感到她的头发轻拂过他的肩膀。
Something brushed against her leg.
有什么东西扫了一下她的腿。
declare against 表态
He declared against the proposal.
他表示反对这项提议。
fight against 反对，与……做斗争
He enlisted with the air force to fight against the enemy.
他应募加入空军对敌作战。
My grandfather fought against the Fascists in Spain.
我的祖父曾经在西班牙与法西斯分子作战。
He fought against the disease for a long time.
他同疾病做了长时间的斗争。
guard against 提防
The armed forces were on high alert to guard against any retaliation.
武装部队保持高度戒备，以防发生任何报复行动。
A reporter tries to guard against inaccuracies by checking with a variety of sources.
记者试图通过多方求证来避免不实报道。
hit against 碰撞
The ball hit against the window.
球撞在窗子上。