// i表示当前要插入的元素索引（从第2个元素开始）
record equipment or "business machines," arguably the first form of business，更多细节参见Line官方版本下载
The protesters begin moving towards parliament, but are stopped by the police barricade.，详情可参考Line官方版本下载
"We hope this price reduction will provide some welcome relief for many gas customers."
"The entire sequence of Artemis flights needs to represent a step-by-step build-up of capability, with each step bringing us closer to our ability to perform the landing missions. Each step needs to be big enough to make progress, but not so big that we take unnecessary risk given previous learnings."