pre-,在前，-curs,跑，词源同course,cursor.

1. Error is often the precursor of what is correct.

错误常常是正确的先导.

2. Real tennis, an ancient precursor of the modern game, originated in the eleventh century.

室内网球，现代网球运动的古老前身，起源于11世纪。

3. Error is often the precursor of what is correct, but conceit is the prelude to a fall.

错误往往是正确的先导, 骄傲是跌跤的前奏.

4. He said that the deal should not be seen as a precursor to a merger.

他说该笔交易不应该被看作是合并的前兆。

5. In the past this had been the precursor to strong decisions.

要是在过去,这就是要采取强力行动的预兆.