On the 31st day of the trial, you will get a trial error message when you try to launch the expired product (Figure 18).

在试用的第 31 天，在尝试启动过期的产品时会收到试用错误消息（图 18）。

youdao

Many drugs were found by trial and error.

许多药物都是经过反复试验后才被发现的。

《柯林斯英汉双解大词典》

Children learn to use computer programs by trial and error.

儿童通过反复摸索才学会运用计算机程序。

《牛津词典》

And that can take a little bit of trial and error."

VOA: special.2010.08.04

In just a moment the hearts are gonna start flowing from bottom to top and the cookies are gonna start moving left and right and they seem to be somewhat synchronized with the music, perhaps based on trial and error by the student who implemented this one.

刚刚那一刻，那些爱心们从底部上浮到顶部,饼干人则向左向右移动,它们似乎都随着音乐的律动而变化着，也许这是那个制作该动画的同学,不断尝试的结果。

哈佛公开课 - 计算机科学课程节选

So it's a trial and error.

那么他反复尝试并得到错误答案。

哈佛公开课 - 计算机科学课程节选

As mentioned above, some trial and error is probably going to be required here.

ENGADGET: How-to: One-click audio news, synced with your iPod in Tiger

This was a long process of trial and error, of putting together, and looking at backtesting.

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The service certainly saves these young researchers trial and error, and therefore time and money.

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