The degree of recombination is reciprocal in most cases.重新结合的程度在大多数情况下是相互的.The committee recommended that recombination DNA work at Princeton be considered in this same light.委员会建议用同样的观点来考虑在普林斯顿的重组体.ECHO cloning is a rap...
A dentist may decide to extract the tooth to prevent recurrent trouble.牙医可能会决定拔掉那颗牙，以免反复发作。Think of the clammy hands you get when you visit the dentist!想想你去看牙医时那双黏糊糊的手！The dentist commenced to dig, drill and finally fill...