The anterograde effective refractory period and Wenckebach block point were measured before and after ablation.

进行慢径路改良，观察手术前后房室结的前传有效不应期和文氏阻滞点的改变。

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Sinus dysfunction group and sick sinus syndrome (P > 0.05), sinus recovery time were not related to Wenckebach block point and 2 : 1 block piont in patients with sick sinus syndrome(P> 0.05) .

将窦房结功能障碍者的窦房结恢复时间与文氏型阻滞点、2：1阻滞点作相关分析，结果均无相关性（P>0.05）。

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But political observers point out that Republicans may worry about offending Hispanics if they try to block her nomination.

VOA: special.2009.05.30

What seems so obvious, at least to me here in reading Lycidas, is that at this point in 1637 there's a stumbling block or a hurdle that Milton in his race simply can't get over.

在我读的过程中，显而易见的是，是在1637年时弥尔顿在他的职业生涯里,有一道无论如何也过不去的坎。

耶鲁公开课 - 弥尔顿课程节选

After the 1968 Ronan Point tower block partial collapse in London, in which four people died, new British Standard Structural Design Codes for concrete were introduced to prevent it happening again.

BBC: WTC collapse forces skyscraper rethink

In the article, I point out that Carson Block has decided to go after a much larger and politically well-connected target in Focus Media compared to his past reverse-merger targets.

FORBES: The Story Behind Today's Earlier Bogus Sina Rumor

With 6:33 left in the first half, Ware, who has played a key role in Louisville's 14-game winning streak, jumped to try and block Tyler Thornton's 3-point shot.

NPR: Louisville Beats Duke 85-63 To Reach Final Four