以下为句子列表：
英文: We put them in a bell jar overnight and allowed them to be slowly moistened,he explained.
中文: “我们头一天晚上就把它们放在一个钟形的玻璃容器里面，让它们慢慢变湿。”他说。
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英文: Feeding mechanism: bucket hoisting and manual double bell jar feeding mechanism is adopted , which is easy to operate and can prevent gas leakage efficiently.
中文: 加煤机构：采用斗提卷扬机构，手动双钟罩加煤装置，操作简便、能有效防止煤气泄漏。
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英文: Feeding mechanism: up roller, middle flashboard and down bell jar or double bell jar feeding mechanism with hydro-automatic drive, featured as easy operation, convenient maintenance and good air-tightness.
中文: 加煤机构：液压驱动自动加煤装置，采用上滚筒中插板下钟罩机构或双钟罩结构，操作简单，维修方便，气密性好。
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英文: If air weren't admitted into the bell jar, the electric bell in the bell jar would not ring because of a lack of a medium.
中文: 如果我们不让空气进入铃罩，铃罩中的电铃一定会因缺少介质而不响了。
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