A lesson learned isn't learned until you learn it.

直到你真正吸取了教训，才算吸取了吸取到的教训。

The first lesson learned is that lessons can be learned.

第一个条件是我们可以吸取经验教训。

Sentence using this lesson learned to perform and communication.

运用本课所学句型进行表演及交际。

Make it small, well intentioned mistake with a positive lesson learned.

它使小型，用心良苦弄错了积极的教训。

JMeter was easy to install and of medium complexity to learn (see the next lesson learned).

JMeter 易于安装并且具有中等的认识复杂度（请参阅下一条经验）。

King did not craft this conclusion from thin air. This was a lesson learned from experience.

这个结论并非金凭空捏造而来，而是真真切切的教训。

Lesson learned, the terror bird withdraws, its native intelligence driving it to change its hunting strategy.

恐鸟得到了教训, 开始退却, 其原始的智力驱使其改变捕猎战略.

Another lesson learned is that you should focus not only on developing version one, but to also think about the following versions.

由此我们可以学到的另一点是，我们不仅要考虑到第一版本的开发还要考虑到其后版本的开发。

The lesson learned here is that the initial users are critical to defining the characteristics and growth patterns of the community.

经验表明，早期用户对于确定社区的特征和增长模型非常关键。

The biggest lesson learned, though, is how accurate my initial customer interview findings were, compared to all the hypotheses that followed.

我学到最重要的一点是，比起其他假设，我起始客户访谈的发现是多么精确啊。