反向（插入）[插入片段与载体方向相反的英文

u orientation

• 反向:    opposite direction ...
• 插入:    insert; infix; run ...
• 片段:    part; passage; fra ...
• 与:    take part in; part ...
• 载体:    carrier; supporter ...
• 方向:    direction; orienta ...
• 相反:    opposite; contrary ...