另外本句中的词汇也颇有迷惑性;虽然没有太难的单词，但是很多单词都是同义词和反义词，容易让人读混(斜线分隔同义词，冒号分隔反义词)。
estimate/measure/compute; feeding rates/grazing rates; zooplankton/grazers; natureal/field; laboratory community; individuall
意群训练：Studies by Hargrave and Geen estimated natural community graz-ing rates by measuring feeding rates of individual zooplankton species in the laboratory and then computing community grazing rates for field conditions using the known population density of grazers.
