1. Note how the word 集中 refers to many items being concentrated in a particular area. We see it used in 大部分的工业集中在首都马尼拉的郊区. Don’t confuse this with 专心 which refers to your focusing your mind on something.

2. Note the sentence construct 受到A的影响 used in 所以菲律宾的文化受到其他国家的影响.