The initial-crack, fracture impact cycle number and impact energy of these concrete beams with different fiber dosages are also tested.

测定了在不同纤维掺量下混凝土梁的初裂冲击次数、破坏冲击次数以及冲击能。

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By the late nineteenth century, mathematicians began to conduct axiomatic study through abstracting the common features of a number of different concrete objects.

到了十九世纪末，数学家开始从众多不同的具体研究对象中抽象出它们的共同特征进行公理化研究。

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"Bodies come in different shapes and sizes, and the very idea that there is a concrete qualifying number, and if someone can match it they're considered healthy, is wrong, " she says.

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