| 单词 | r and d |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔R and D〕If we want to get ahead of our competitors, we ought to invest more in R and D.如果我们想领先于竞争对手，就应该在研发上增加投入。剑桥高阶If we want to get ahead of our competitors, we ought to invest more in R and D.若想领先于我们的竞争对手，我们应该更多地投资研究与开发。剑桥国际 |
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