The two pieces being cemented together with a thin film of Canada balsam .
再将这两块晶体用一层加拿大树胶薄膜粘合在一起。
Canada balsam: a viscous yellowish transparent resin obtained from the balsam fir and used as a cement for glass lenses and for mounting specimens on microscopic slides.
加拿大香脂：从香脂冷杉中获取的一种有粘性的，淡黄色的透明树脂，用作玻璃透镜的胶合剂或将标本粘贴在显微薄片上。
Canada balsam: a viscous, yellowish, transparent resin obtained from the balsam fir and used as a cement for glass lenses and for mounting specimens on microscopic slides.
加拿大香脂：从香脂冷杉中获取的一种有粘性的、淡黄色的透明树脂，用作玻璃透镜的胶合剂或将标本粘贴在显微薄片上。
Canada balsam: a viscous, yellowish, transparent resin obtained from the balsam fir and used as a cement for glass lenses and for mounting specimens on microscopic slides.
加拿大香脂：从香脂冷杉中获取的一种有粘性的、淡黄色的透明树脂，用作玻璃透镜的胶合剂或将标本粘贴在显微薄片上。
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