on the part of somebody (on somebody's part): “就某人而言；代表某人，某人所做的” e.g. a.It was a mistake on the part of Mr.Jones to sign the contract without reading it. 不先看合同就签字是琼斯的错。 b.This requires great efforts on the part of the students as well as the teachers. 这需要老师和学生的共同努力。 on the part of somebody (on somebody’s part): “就某人而言；代表某人，某人所做的” e.g. a. It was a mistake on the part of Mr. Jones to sign the contract without reading it. 不先看合同就签字是琼斯的错。 b. This requires great efforts on the part of the students as well as the teachers. 这需要老师和学生的共同努力