A few even bounced straight back at the observer, which Rutherford said was as unexpected as firing a cannon shell at tissue paper and having it come back and hit you.
甚至极少数发生大角度的散射，卢瑟福后来回忆说：“这是我一生中从未有的最难以置信的事，它好比你对一张纸发射出一发炮弹，结果被反弹回来而打到自己身上。”
An iron cannon was actually installed for the purpose of subduing invading forces but it was later dismantled without a shell ever being fired.
实际上为了抵御外侵还安置了大炮，但随后又拆除了点火装置。
Since cannon drum of agile shell-feeding system rotates frequently and intermittently, its movement must be steady.
敏捷供弹系统弹鼓的运动是频繁的间歇转动，运动必须平稳。
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