In addition, to be integrable, the classical dynamic institution for high-strain-rate materials is decoupled and natural strain is introduced.

同时为便于积分，在经典的高应变率材料动态本构关系中，使应变强化项与应变率项相互解耦，并引入自然应变形式。

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For the shear part, the assumed natural strain method is employed to construct the shear strains to obtain pertinent stiffness matrix and overcome shear locking for thin shell problems.

而剪切部分则采用假设自然应变的方法来获得能克服薄壳下剪切自锁的新剪应变并用于计算此部分的刚度矩阵。

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Spicy food flavoured with hot chilli peppers contains a natural chemical ingredient that may lower blood pressure, according to a study on a strain of laboratory rats with hypertension.

一项对患有高血压的实验鼠的研究显示，添加了辣椒粉的辛辣食物含有一种天然的可以降低血压的化学成分。

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Carter Roberts, chief conservation officer for the World Wildlife Fund, said that the strain on natural resources threatens environmental progress as the world strives to match America's prosperity.

CNN: Challenges ahead for a changing Earth

With their classic Texas sound intact throughout and with songs covering timely themes such immigration, financial strain and natural disaster The Flatlanders' members carry on with as much relevance today as they had when they first got together.

NPR: The Flatlanders On Mountain Stage

By patching in a plant gene, they have created a mutant strain that can make an enzyme which converts a natural amino acid called tyrosine into one of the synthetic forms.

ECONOMIST: Chemists are trying to synthesise new varieties of life