At depths of nearly four hundred meters, the researchers found the oldest examples of two species of coral.

VOA: special.2009.05.12

Those animals that you produce are called transgenic animals because they're expressing, usually at high levels, a transgene or a gene that's not normally present in their species.

那么这些小鼠就称为转基因动物,因为转基因动物,通常能高效地,表达转基因,即一个通常不存在于该物种的基因

耶鲁公开课 - 生物医学工程探索课程节选

The researchers looked at seventy species of mangrove.

VOA: special.2010.04.20

(OMITTED) The report says, farmers have relied so heavily on glyphosate that at least eight species of weeds are now resistant to it.

VOA: standard.2010.04.15

"You are probably going to see several hundred species at one time at the exhibit.

VOA: standard.2010.02.21