我们仔细观察了他动作的每个细节的英文

we carefully watched every detail of his action

• 我们:    we
• 仔细:    careful; attentive
• 观察:    observe; watch; su ...
• 了:    finish; complete; ...
• 他:    he
• 动作:    movement; motion; ...
• 的:    4次方是 The fourth po ...
• 细节:    details; particula ...