⑴ VF涓鎬庢牱鎶婁竴涓琛ㄩ噷鐨勬暟鎹澶嶅埗鍒板彟涓涓琛ㄤ腑錛熺敤鍛戒護鏉ュ嶅埗銆
1銆佺浜屼釜琛ㄤ笉瀛樺湪use 絎涓涓琛 to 絎浜屼釜琛2銆佺浜屼釜琛ㄥ瓨鍦use 絎浜屼釜琛append from 絎涓涓琛
