汉堡包原来是指牛肉饼和牛排，现在主要是指一种扁平且成圆形的（flat and round）牛肉馅饼面包。不过现在人们（主要是在美国）说到汉堡包时，也可能是专指牛肉饼或碎牛肉。
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flat and round steel-chain 平圆式钢链
Single-phase Surface-type Flat-and-round Two-pole Socket-outlet 单相两极双用明装插座
Single-phase Flush-type Flat-and-round Two-pole Socket-outlet 单相两极双用暗装插座
round and flat 呈圆形而厚度较小的
Tortillas are usually flat and round, but they can also be made into other shapes.
玉米饼通常是扁圆的，但也可以把它们做成其他形状。
The forming accuracy of flat and round bottomed cylindrical shells formed by hydraulic counter pressure deep drawing is investigated.
本文系统地研究了平底和球面圆筒形件充液拉深成形精度。
They are flat and round, or oval, in a pale yellowish color. A big difference from the domestic Chinese soybeans is that the hilum is is brown. They are commonly called Black-Hilum Beans.
采集的进口转基因大豆，呈扁圆或椭圆、色泽暗黄，与国产大豆明显区别是豆脐呈黄褐色，俗称“黑脐豆”。
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