PET film oxygen permeance ratio is dropped after crystallization through drawing tropism, modified the barrier performance.

经过拉伸取向结晶后的PET薄膜氧气透过率获得下降，改善了阻隔性能。

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The permeability (P), diffusion (D) and solubility (S) coefficients for polymers and coatings are key parameters that affect a polymer's barrier performance.

聚合物和涂层材料的渗透系数（P）、扩散系统（D）和溶解系数（S）是影响聚合物阻隔性能的关键参数。

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The memory barrier performance of a single Intel P4 with hyperthreading (two processor cores on one die) is faster than with two P4s, and both have different performance characteristics than Sparc.

一个超线程（一个模具上有两个处理器核心）Intel P4 的内存壁垒性能（memory barrier performance）要快于两个 P4，而两者的性能特征又不同于 Sparc。

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United were industrious and well-organised, with goalkeeper Edwin van der Sar presenting a formidable barrier with a performance that once again suggested his decision to retire at the end of the season may be premature.

BBC: Chelsea 0-1 Man Utd

The species barrier they face may fully explain the difference in performance compared with children.

WSJ: The Brains of the Animal Kingdom

Gerrard Batten, UKIP MEP for London, said UKIP's performance on Thursday had "broken the psychological barrier with the electorate", as voters now believed a vote for UKIP could count in the first-past-the-post system.

BBC: Lord Tebbit urges Tories to set EU referendum date