On the other hand, one species in a group will sometimes resist great changes of conditions with unimpaired fertility; and certain species in a group will produce unusually fertile hybrids.

另一方面，一个群体中的一个物种有时会以未受损的生育能力抵抗条件的巨大变化；一个群体中的某些物种会产生异常肥沃的杂交种。

" My young lady is looking sadly the worse for her change of condition, " I remarked. " Somebody's love comes short in her case, obviously: whose, I may guess; but, perhaps, I shouldn't say."

“我的小姐自从改变环境后显得憔悴多了，”我说。“显然，有人不再爱她了；是谁，我可以猜得出；但也许我不该说。”