1·Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly.
实验表明，如果美洲稀树大草原没有发生火灾，物种组成将发生显著变化。
2·If a change does not affect the food's chemical composition, we call it a physical change.
如果一种变化不影响食物的化学成分，那我们便称之为物理变化。
3·He or she may change the colours, the perspective, or the composition of pictures.
他或她可能会改变图画的颜色、视角或组成部分。
4·If you change the composition, you change the properties. But this is different.
如果你改变组成成分，你就能改变属性，但是这是不同的。
5·Citrus fruits, which normally ripen on the tree and contain no starch, undergo little change in carbohydrate composition following harvest.
在果树上正常成熟且不含淀粉的柑桔类水果，其碳水化合物组成在摘下后很少变化。
6·As Ms Jones and Dr Sykes told the meeting, the composition of the chemicals released by the corpses did, indeed, change over time.
如琼斯和赛克斯博士在会议上报告的一样，尸体产生化学物质的成分的确是随时间变化的。
7·As with the twins, the yoghurt bacteria did not change the composition of the rodents' resident communities.
同双胞胎一样，酸奶中的细菌并不能改变该啮齿动物的本身的菌群构成。
8·At low doses, their effects aren't known, but may involve subtle and widespread stresses that ultimately change the composition of ecosystems.
如果含量过低，他们的效果还不是太清楚，但是可能最终还会引起生态系统组成的微小的、广泛的变化。
9·The composition of America's trade deficit is likely to change, but it's not clear that there would be a big shift in its size.
美国贸易逆差的组成很有可能改变，但是会不会造成有规模的大幅变化还不清晰。
10·Issuing European bonds would not lower a country's overall debt, but only change its composition.
发行欧洲债券不会降低一个国家的总体债务水平，而只是改变了其债务的结构组成。