当鱼不使用鱼鳍时，会将它们折叠起来，收回到特殊的沟槽或者凹陷部位；这样鱼鳍就可以与身体保持齐平，以维持它们平滑的外形。
When not in use, the fins are tucked into special grooves or depressions so that they lie flush with the body and do not break up its smooth contours.
记下对话的性质。听的时候找出表示人物年龄或家乡的特殊表达方式。记录下值得注意的对话中成员的外形和年龄。
Listen for particular expressions that indicate a person's age or regional origin. Document the age and appearance of the participants in notable conversations.
江西馆的外形类似于一个巨大的青花瓷容器，描绘出了江西作为无数人才和丰富的自然源之乡的特殊魅力。
The pavilion, resembling a huge blue and white porcelain container, depicts the peculiar charm of Jiangxi as home to a myriad of talents and natural resources.
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