If, as a developer, you know these things, you can improve the user experience and content through AD targeting, personalization, and recommendation.

如果你是一名开发者，知道这些以后，你就可以通过广告定位、人性化以及推荐机制改善用户体验和内容。

youdao

Through long experience, my family has come to know that their chances of having a vaguely pleasant husband and father on any given Sunday depend largely on how Liverpool fared the previous day.

我的家人从长期的经验中明白了一个道理：她们的丈夫和父亲在某个特定的星期天能否显露出某种莫名的欣喜之情，大都取决于利物浦队前一天的战果如何。

youdao

Saying goodbye to a parent is the most difficult experience I have ever gone through. You never really know how hard it will be until it happens.

失去至亲是我这辈子最痛苦的经历。你永远不会明白那种痛苦直到你也有了那种经历。

youdao

So it really, you know, becoming familiar with the different methods is best done through experience, not through books.

所以，真的，你知道，熟练掌握不同的方法最好是通过经验，而不是通过书。

迷上网页设计 - SpeakingMax英语口语达人

Our workers know this, through painful experience.

NPR: State of the Union: Democratic Response Text

The story of how we know all these facts is told through Mr. Scharf's personal experience.

WSJ: Book Review: Gravity's Engines

"What makes the difference ... is the willingness of the legislators and the governors to take the lead and also, you know, the experience of gun violence in that state, whether it be through a mass shooting or the day-to-day shootings, " said Lindsay Nichols, staff attorney for the Law Center to Prevent Gun Violence, a gun-control advocacy group based in San Francisco.

WSJ: Few states find narrow route to gun control laws