| 单词 | essential link |
| 释义 | essential link It was an essential link for transatlantic travel until the late 1960s. Times, Sunday Times When did we begin persecuting this valuable if not essential link in our ecosystem? Times, Sunday Times It represents an essential link between process research and commercial production. Retrieved from Wikipedia CC BY-SA 3.0 The small carriers provide essential links onward to smaller communities. Retrieved from Wikipedia CC BY-SA 3.0 These organisms are often essential links in the food chain between primary producers and larger species. Retrieved from Wikipedia CC BY-SA 3.0 |
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