iOS uses the new advanced voice. When selecting multiple words, the voice of the iOS system is often used first, and the web page voice is played the second time.
这个我之前问过，网络差的时候，会这样，但是播放一次以后，这个词汇就不会来回跳了，因为已经缓存好了
只能用一段时间让他缓存多一点来缓解这个问题？
是的，缓存过的词汇，不再会出现这个问题，只有陌生的词汇会这样
@len1984 Correct, as @lisanbao40 explained, sometimes it takes more time for the voice to load for words that aren’t cached already.