粗（细）焦点
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strong weak focus
强弱聚焦
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Small telescopes see a lot of sky but can detect only strong signals. Large ones, which can detect weak signals, have a narrow focus.
大型的望远镜虽可以检测到微弱的信号，却只有很小的焦距。
youdao
Companies, strong or weak, shall focus on fair competition.
公司不分强弱，重在公平竞争。
Sometimes there is a strong focus on slavery but weak punishments, says I.L.O.official Roger Plant.
VOA: special.2009.06.08
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