这种物质现已被分子生物学家克隆。

This substance has now been cloned by molecular biologists.

《柯林斯英汉双解大词典》

这种物质聚合形成坚硬的塑料。

The substance polymerizes to form a hard plastic.

《牛津词典》

这种物质切莫与食物接触。

This substance should not come into contact with food.

《牛津词典》

If you could introduce that gene you'd make the chemical, in this case it's a protein called vascular endothelial growth factor.

通过导入一种生成特殊化学物质的基因,这种疗法中指的是一种蛋白,叫做血管内皮生长因子

耶鲁公开课 - 生物医学工程探索课程节选

That can be supplied by an antagonist called Aldopa - which is not exactly the same as dopamine, it's slightly different.

这种物质能够由一种拮抗剂,叫做阿多巴转化而来,但它与多巴胺的结构并不完全相同,有一点差别

耶鲁公开课 - 生物医学工程探索课程节选

It's a material force that his rhetoric challenges and relies on, gives him a means of getting off the ground, and a means of always getting back to it, too.

这是他的修辞所挑战的并且依赖的物质力量，这种力量给他离开地面的方法，也给他回到地面的方法。

耶鲁公开课 - 现代诗歌课程节选