Dendritic cells in the germinal center may endocytose such antigenic material and present it to T cells, activating them.

生发中心的树突状细胞可以内吞这种抗原物质并将其呈递给 T 细胞，从而激活它们。

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Genetic material may come from many sources such as hair, blood or even cells from inside one's mouth.

遗传材料有多种来源，如毛发、血样甚至口腔内的单个细胞。

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There may not be Web sites devoted to purloined pictures - there are such sites for music or videos - but many people have a cavalier attitude toward using cameras to obtain copyrighted material.

也许网上没有专门提供盗版图片的网站，但提供盗版音乐和盗版视频的网站还是有的，这间接反映出人们对用相机拍摄受版权保护的材料还是抱着一副随便的态度。

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Charts, maps and models which are used to demonstrate or explain matters are not evidence themselves, but testimony based upon such items and marks on such material may be evidence.

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Understanding such social behaviour may hint at ways to design other sorts of superconducting material or even, paradoxically, better insulators.

ECONOMIST: Magnetism