观察到珍珠文石中普遍存在的孪生现象，并讨论了电子辐射的作用。
Twins in pearl aragonite were frequently observed. The electron irradiation effect was discussed.
来自西雅图太平洋海洋环境实验室（Pacific Marine Environmental Laboratory）的研究者理查德·菲利（Richard Feely）为媒体界提供了一个礼物，他将海洋酸化现象戏称为“全球变暖的罪恶孪生兄弟”。
Richard Feely, a researcher at the Pacific Marine Environmental Laboratory in Seattle, provided a gift to headline writers when he dubbed acidification “global warming’s evil twin”.
本文初步研究了纯钛拉伸过程中出现的屈服点现象，从理论上分析其现象与孪生关系。
A preliminary study was carried out on the yielding phenomenon of pure titanium in tension process. The theoretical analysis shows that the phenomenon is related to twinning.
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