youdao

Compared with the normal mice, those with one mutant gene slept about 1.2 hours less, and mice with two mutant genes slept 2.5 hours less.

与正常的老鼠相比，携带一个变异基因的老鼠睡眠时间少1.2小时，而携带有2个变异基因的老鼠睡眠时间少2.5小时。

youdao

Again, the mutant mice behaved appropriately, but they were much less aggressive, spent less time fighting and they took longer breaks between attacks.

这个基因改变的老鼠表现是适当地，可是它们的攻击性减小、打斗的时间也减少而且在打斗之间的休息时间更长。

youdao

Again, the mutant mice behaved appropriately, but they were much less aggressive, spent less time fighting and they took longer breaks between attacks.

ECONOMIST: Behaviour of the sexes

AIDS. The likelihood that a mutant protein can slip through unnoticed is small: the spectrometer can tell apart proteins that differ by less than a tenth of a proton mass in weight.

ECONOMIST: Viruses: Hunt the mutant | The