A key break came in the late 1970s, when a UCLA team began to publish the results of an influential long-term study called the UCLA Family Project.

一个关键的突破口出现在七十年代晚期，那时候一个加州大学洛杉矶分校小组开始发表一个称之为“加州大学洛杉矶分校家庭计划”的具有影响力的长期研究的结果。

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Users might not have an hour to learn everything, but if you break down key functions into smaller pieces, users can willingly partake.

用户可能无法用一个小时来学习所有内容，但如果您将关键功能分成较小的部分，则用户会欣然参与。

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The key is knowing when to follow the rules and when to break them.

关键是要知道何时该循规蹈矩，何时需破旧立新。

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Packaging Corp. of America (PKG) had a key break out last week and a nice follow-through on Monday, up 1.20 to 34.95, or 3.6%, on 2.6 million shares.

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If these key levels break the risk is to my semiannual value levels at 9, 635 and 8, 468.

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The metals are explosive movers, so be wary that a break of key support levels could lead to much deeper retracements.

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