hybrid vigour

基本解释

The MHC is also thought to act as a proxy for general outbreeding, with all the hybrid vigour that can bring.
同时MHC还被认为是远系繁殖的媒质，因为它可以带来杂交优势。
Hybrid vigour is common in plants and is found in some animals—though, some speculate, it may be lacking in European royalty.
杂交优势通常在植物中非常普遍在一些动物中也有体现——不过有人猜测，在欧洲皇室中缺乏这种效应。
It is said that Romero “bred the zombie with the vampire, and what he got was the hybrid vigour of a ghoulish plague monster”.
据说罗梅罗“让僵尸和吸血鬼杂交，得到了具有杂交优势的令人毛骨悚然和麻烦的怪物”。

The MHC is also thought to act as a proxy for general outbreeding, with all the hybrid vigour that can bring.
ECONOMIST: Perfume science
Heterosis is a source of hybrid vigour, a very important strategy.
FORBES: The Science of Tequila (Snobbery)
Although hybrid vigour can produce good hooves, plenty of stamina and a hardy disposition, it can also lend itself to other traits, such as recalcitrance.
ECONOMIST: The West’s wild horses