They were originally developed for the battlefield environment during the Cold War, where they would encounter strong opponents in air combat.

这批战斗机最初是以冷战为背景而设计的，那个时候它们在空战中会面临强劲对手。

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"I would tell them that they are not the first to encounter this," said Chafetz, whose mother had Alzheimer's.

“我想告诉他们，他们不是第一个遭遇此病的人”查菲茨说，他的妈妈也患了阿尔茨海默病。

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Users would encounter it after they filled their shopping cart with products they wanted to purchase and pressed the Checkout button.

当用户将想买的商品放进购物车，点击“付款”按钮后，就会遇到这个表单。

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They simulated the human digestive process by subjecting the tissue to treatment with the same digestive fluids they would encounter in the intestinal tract.

BBC: Prions damage brain tissue

Police acted quickly to arrest Mr Strauss-Kahn just hours after the alleged encounter - but they would not have acted in such haste had he not been on a plane bound for France, says Linda Fairstein, the former head of the sex crimes unit in the Manhattan district attorney's office.

BBC: Strauss-Kahn: What went right and wrong?

It is clear that no criminal liability can be attached to someone who has sex with a person who as the result of alcohol has decided to enter into a sexual encounter with them, a decision they would not have made if they were sober.

BBC: NEWS | UK | Scotland | Crucial issue of consent reviewed