每日口說挑戰 單身萬歲：學會孤獨才是生存的關鍵！ (Why Being Lonely Is Crucial For Survival)

今日挑戰句子

But was the mouse's choice motivated by positive reward or a negative experience?

但這隻老鼠的選擇究竟是受正面獎勵還是負面經驗所激發呢？