雅思写作句型整理：如何表达时间
英语课
1. in + 月/ 年
2. between … and …
3. from … to …
4. over the period from … to …
5. in the year between … and …
6. in the 3 years spanning 1 from 2001 through 2004
7. for the first 3 months
8. for/ during/ over the next / following 6 months
9. for/ during/ over / in a period of 4 months
10. for/ during/ over / in a 4- month period
11. over/ for / during the same period
12. from then on / from this time/ point onwards / since then
13. by the year of …
after / before + 年/ 月
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收听单词发音 1
spanning
n. 跨度, 拉线, [数]生成, 长成
动词span的现在分词形式
参考例句：
We call such a spanning subgraph T an economical spanning subgraph. 我们称这样的生成子图T为廉价的生成子图。
These were serious investigations, each spanning several months. 这些审查都很慎重，每一个审查项目都要用几个月的时间。
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雅思写作