【注解】crane:仙鹤,起重机懒惰:sloth, idleness, indolence
28.对鸟类的研究数据太少题paucity...premature/ description/ exhaustive
说对某种鸟类的研究数据太____,不能如何，所以要求科学家进行更____的研究.
【注解】paucity:[n]小数目,量少exhaustive: [adj]消耗的,彻底的assertion: [n]主张premature: [adj]过早未成熟的
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