Songliao Basin is a secondary lithologic trap including lithologic updip pinch out trap, diagenetic trap, tight reservoir trap and mud stone fracture trap.

松辽盆地次生岩性圈闭包括岩性上倾尖灭圈闭、成岩圈闭、致密储层圈闭以及泥岩裂缝圈闭等类型。

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Lee soon discovered that it would not be easy to break out of the trap that Richmond and Petersburg had become.

VOA: special.2009.12.17

"The society does not advocate just anybody going out to trap mink and would not want this to be encouraged, " he said.

BBC: Club's 'mince mink' campaign

The likeliest outcome is therefore neither a sudden, history-altering reduction in defence spending, nor a quick fix that lets Congress wriggle out of its trap, but a drawn-out and perhaps salutary election-year debate about how much defence to buy at a time of distress.

ECONOMIST: Lexington

"The principle of Universal Credit is sound but our research has found the actual roll-out could unintentionally trap people in poverty and hardship, " the organisation's chief executive Julia Unwin said.

BBC: Queue outside a Jobcentre Plus