In 132 head of steam trap testing done shows that 42% of the traps have been effective.

在对蒸汽主管的132只疏水阀所做的检验表明，42%的疏水阀已实效。

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The steel wire trap is a kind of simple and effective collection device for diesel engine particulate emission.

钢丝纤维捕集器是一种简单、有效的柴油机尾气颗粒排放收集装置。

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The attractive activity of this attractant to M. alternates was similar with prototype attractant and the effective attractive radius and trap ratio was 70 m and 43.8% in forest, respectively.

该引诱剂引诱松褐天牛成虫的引诱活性与原型引诱剂基本一致，其林间有效作用半径和诱获率分别为70 m和43.8%。

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This bare, sandy earth then becomes an effective rain trap - with no vegetation, water cannot be lost through transpiration (the evaporation of water from plants).

BBC: Termites 'engineer fairy circles'

Scientists who ran the Krebs trial have warned the government that its plan to allow shooting of badgers as they roam was likely to be less effective than the trap-and-shoot method deployed during the trial.

BBC: Badger vaccine pilot planned by National Trust in Devon

But what they fail to acknowledge is that it is the two-state trap that makes the construction and execution of an effective public diplomacy strategy impossible.

CENTERFORSECURITYPOLICY: Let us embrace our friends