Что думаешь? Оцени!
The research, using data from more than 1.8 million people who were tracked over many years, found that vegetarians had a 21% lower risk of pancreatic cancer, a 12% lower risk of prostate cancer and a 9% lower risk of breast cancer compared with meat eaters. Combined, these cancers account for around a fifth of cancer deaths in the UK.，更多细节参见同城约会
，这一点在WPS官方版本下载中也有详细论述
NSMutableData *data = [NSMutableData dataWithLength:arr.size];
每個虛構詞都對應到特定的物體。使用這類稱為「偽詞」（pseudowords）的方式，能讓研究者公平比較學習成果，因為學生無法依靠任何既有知識。，这一点在safew官方版本下载中也有详细论述
* 时间复杂度：O(n)，空间复杂度：O(n)