There is a great connection between the teacher-student relationship and the teaching effect.

师生关系与教学效果有很大关系。

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To argue for a cause-and-effect relationship, scientists must attempt to explain why and how a connection could occur.

想要证明因果关系，科学家们必须尽量解释这种联系可能出现的原因和方式。

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Although it may seem logical, this has an important effect: If a database connection is closed for some reason, any database objects that it contains are also closed.

虽然这看上去合乎逻辑，但是存在一个重要影响：如果由于某种原因关闭了数据库连接，那么也将关闭该数据库包含的所有数据库对象。

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Twitter has enabled me to effect better connection with clients, employees, peers and, yes, even prospects.

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This creates an emotional connection and ripple effect whereby others around the world will want to visit the country, do business it with and build their lives in a particular place.

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The complexity of the business environment, where the connection between cause and effect is so difficult to visualize, makes it necessary to admit mistakes, explained Levitt.

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