在实验中，这两种动物被给予了向人讨要食物的机会，一种是肯帮忙的人一种是从看不见潜在乞讨者的人。
In the experiments, the two sets of animals were given the opportunity to beg for food, either from an attentive person or from a person unable to see the potential begger.
麦肯齐先生在回家到他父亲在纽约的埃尔·迈拉的小借贷所里帮忙之前，他在华盛顿干了几年金融工作。
Mr. McKenzie spent years in finance in Washington before coming home to help at his father's small savings and loan in Elmira, n.y..
起先他对我的想法不太有把握，但最后的时候他非常肯帮忙。
He wasn't sure about my idea at first but in the end he was very helpful.
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