Warning: file_put_contents(): Only 0 of 6393 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/201990.com/index.php on line 55 income-cost是什么意思，income-cost的翻译，income-cost音标、读音、用法和例句_耀久九英英词典
So we must change the proportion of the cost and income for the altruistic behavior, and arouse persons' altruistic behavior by improving the income for the altruistic behavior. 因此，必须改变利他行为的成本收益比，提高利他行为的收益来激发人们的利他行为。