This undesirable result would be a direct consequence of differences among species.
这种不合意的结果将是物种间区别的一个直接后果。
These studies indicate that some drugs and poisons have a certain impact on the growth and development of necrophagous flies, and this impact has differences among species.
研究表明，某些药(毒)物对尸食性蝇类生长发育具有一定的影响，且这种影响存在种属差异。
The answer lies in two associated differences among the species, in their digestive systems and body sizes.
答案在于两个相关的物种之间的差异，它们的消化系统和体型。
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