1 go through 经历 经受(困难时期)
The customs men went through his suitcases 检查
2 set down记下
not everyone can set down laws 制定
he set down the tool 放下
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set out\off出发 动身
set up 树立 建立
set about开始 着手
3 a series of一系列
a series of fact流水账
a series of+名词复数作主语时,谓语动词 用单数形式
two series of+名词复数作主语时,谓语动 词用复数形式
**series单复数同形