经过和他一段时间的接触，她早已知道现在他是什么表情。
After spending the past year or so with Derek, she had determined what the look meant, but also had determined that it was best to ignore it.
诡异的中微子通常避免与物质接触，但每隔一段时间，总要与一个原子发生碰撞，产生使人们可以观察到的信号。
Wily neutrinos usually avoid contact with matter, but every so often, they crash into an atom to produce a signal that allows us to observe them.
从古至今，动物救人的传说时有听闻，许多与动物接触过的科学家或研究者在观察动物一段时间后，大多会提出保护动物的呼吁，为什么呢？
Since ancient times, there have been many stories of animals saving human lives.Most scientists or research experts, after observing animals for some time, appeal for their protection.Why?
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