琼斯教授似乎已成了该俱乐部的常客了。

Professor Jones seem to have become a fixture in that club.

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教授给俱乐部的成员讲有关食物的问题。

The professor talked to the club about the problem of food.

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教授给俱乐部的成员讲有关食物的问题。

The professor talked to the club about the problem of food.

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