With glasses, we'll only need to track where the glasses are and where the eyes are relative to them as opposed to where the eyes are actually looking.

对于戴眼镜的情况，我们只需要跟踪眼睛的位置以及眼睛相对于眼镜的位置，而不需要知道眼睛实际上是朝哪儿看。

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They can swim (as opposed to drifting in the current) and scientists at the Tropical Australian Stinger Research Unit recently developed tagging technology to track the killers' movements underwater.

它们能游泳，不像其他种类一样随波逐流。最近，澳大利亚热带毒刺研究组的科学家们发明了一种标记技术，可以追踪这种海洋杀手在水下的行踪。

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But the Police Federation, the policemen's trade union, is strongly opposed to fast-track entry which would give high-fliers on short-term contracts accelerated promotion into senior ranks without having to serve on the beat as a constable.

ECONOMIST: Jack Straw takes on the law

Despite an overhaul of the bankruptcy laws in 1998, it is still awesomely difficult to foreclose on debts: the definition of bankruptcy turns on net worth, as opposed to cash flow, and the process is slowed down by a two-track system that separates forced restructurings from forced liquidations.

ECONOMIST: Thailand's biggest problem is debt

McLaren surprised everyone by running with a conventional rear wing in first practice as opposed to a shallower, lower model more suited to Monza's low-downforce track.

BBC: Jenson Button 'needs' podium finish at Italian GP