短語詞組短語logical right shift 邏輯右移logical left shift LGL 邏輯左移位logical chart shift 邏輯移位logical left shift 邏輯左移logical l shift 邏輯移位logical right shift LGR 邏輯右移位Logical Shift Right 邏輯右移logical shift left 邏輯左移logical shift operation 邏輯移位操作 返回 logical shift