Soon, he or she receives an alert stating that the (now correct) field is wrong.

过了一会儿，他收到警告，指出这个字段是错误；但是，实际上这个字段现在是正确的。

youdao

As the platoon looped back to base, an alert Marine noticed a stretch of orange kite-string hidden in the furrows of a barren field.

当这个排原路返回基地时，一位警惕的陆战队士兵注意到一段橙色风筝线埋在一块荒地的梨沟里。

youdao

Be alert for the possibility of something that makes a good picture, even though it's elsewhere on the field and you couldn't possibly anticipate it.

要留神任何能够成为一幅好照片的事件，即便是它发生在你无法预测到的球场上的任何地方。

youdao

And the Northern Irishman, a contender for player of the year, was alert to pounce on a suicidal cross-field pass by David Elebert to McLaughlin.

BBC: Rangers 1-0 Hamilton

And, four minutes later, the alert Charnley pounced on a loose ball to go three quarters of the length of the field - to take his tally to 18 tries for the season.

BBC: Warrington 24-44 Wigan