劍橋詞典a device containing a gas in which units of matter smaller than atoms are shown to be present by the small drops of liquid that they produce 云室（一種充滿氣體的設(shè)備，在其內(nèi)部，比原子小的物質(zhì)粒子經(jīng)過時(shí)，氣體會凝成液滴，液滴的出現(xiàn)證明這種微粒的存在） 返回 cloud chamber