But a hardness appeared at the edge of her mouth. She looked at you with eyes that were like tin telescopes.
但她的嘴角开始僵硬，看人时，眼睛好像铁皮望远镜一样。
This article also describes some efficient steps for operating edge roller , stabilizing convection of tin fluid and settling flow of glass fluid .
本文将从合理使用拉边机、稳定锡液对流、稳定玻璃液流等方面所采取的有效措施作一些介绍。
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