在abap中将内表中的多行结果合并成一个新字符串

如题，
原题要求先拆分一个随意的英文string，然后loop循环。
代码如下：

 DATA: str1 TYPE string,
itab TYPE TABLE OF string,
text TYPE string VALUE 'Presentation styles of search results have been constantly changing in these years, which affect users'' click-through behaviors. In order to discover what the'.
SPLIT text AT space INTO TABLE itab.
LOOP AT itab INTO str1.
  WRITE :/ str1.
ENDLOOP.

现在需要把内表中的多行结果又重新的合并起来，求大神讲解。

使用关键字CONCATENATE：

CONCATENATE LINES OF itab INTO text SEPARATED BY space.

DATA: str1 TYPE string,
itab TYPE TABLE OF string,
text TYPE string VALUE 'Presentation styles of search results have been constantly changing in these years, which affect users'' click-through behaviors. In order to discover what the'.
SPLIT text AT space INTO TABLE itab.
LOOP AT itab INTO str1.
  WRITE :/ str1.
ENDLOOP.

"CONNECT STRING、
DATA:LV_STR_RESULT TYPE STRING,
     LV_STR_TEMP   TYPE STRING,
     LV_FLAG TYPE C.

LOOP AT ITAB INTO STR1.
  LV_STR_TEMP = STR1.
  CLEAR:LV_FLAG.
  AT FIRST.
    LV_STR_RESULT = LV_STR_TEMP.
    LV_FLAG = 'X'.
  ENDAT.
  IF LV_FLAG NE 'X'.
    CONCATENATE LV_STR_RESULT STR1 INTO LV_STR_RESULT SEPARATED BY SPACE.
  ENDIF.

ENDLOOP.
WRITE:/ '原字符串  ' ,TEXT.
WRITE:/ '拼接字符串', LV_STR_RESULT.

注意下首行