4周搞定2000+托福核心词
活泼地；精力充沛地；用力地
vigorously
常考释义
Indeed, if you take baby tree swallows out of a nest for an hour feeding half the set and starving the other half, when the birds are replaced in the nest, the starved youngsters beg more loudly than the fed birds, and the parent birds feed the active beggars more than those who beg less vigorously.
所以，如果你将树燕雏鸟带离鸟巢一个小时，并将一半雏鸟喂饱同时不让另外一半吃东西，当把雏鸟们放回巢时，饥饿的雏鸟们会比已经吃饱的雏鸟们叫得更响，而鸟父母会给积极乞食的雏鸟们比不积极的雏鸟喂更多的食物。
来源于：阅读OFFICIAL11 P3adv. 激烈地；强烈地；坚决地
adv. 猛力地；使劲地
adv. 茁壮地；朝气蓬勃地
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