A survey in 2016of youth from 18 African countries found that,of those who had watched CGTN,63% had liked the channel and only 13% had a negative view.
foun that 后面是接了宾语从句么？that后面加逗号是为了不同后面的of those 防止歧义么？为何要用 of those呢？
A survey in 2016 of youth from 18 African countries found that, of those who had watched CGTN, 63% had liked the channel and only 13% had a negative view.
【翻译】2016年对18个非洲国家的年轻人进行的一项调查发现，在观看过中国国际电视台的人中，63% 的人喜欢这个频道，只有13% 的人有负面的怎么看。
【剖析】
1. A survey in 2016 of youth from 18 African countries（主语） found （谓语）that, of those who had watched CGTN, 63% had liked the channel and only 13% had a negative view.（宾语从句）
2. of those who had watched CGTN, 63% = 63% of those who had watched CGTN
有时，为了照顾句子匀称，可以把表示范围的、作定语的介词短语提前，而把中心词置后。这个时候，被提前的介词短语和中心词之间，一般加逗号表示停顿。又如：
Of the first Spanish to go to California, the majority were religious men whose ministry was to teach the Catholic religion tothe native. 在第一批前往加利福尼亚的西班牙人中，大部分是宗教人士，他们的任务是向当地居民传授天主教。
Of the first Spanish to go to California, the majority = The majority of the first Spanish to go to California
3. CGTN：中国国际电视台，中国环球电视网
