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。
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。
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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