词汇
1真题出现次数
1套试卷
0次落在考点上
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真题原句共 1 句
a. 相互的，往复的，互利的1 次
“Rats have been shown to engage in multiple forms of reciprocal help and cooperation, including what is referred to as direct reciprocity — where a rat will help another rat that has previously helped them,” says Quinn.
“已有研究表明，老鼠会进行多种形式的互助与合作，包括所谓的直接互惠——即一只老鼠会帮助之前帮助过它的另一只老鼠，”奎因说。