动物快要灭绝的英语表达是 "animals are on the verge of extinction."

这个表达的来源可能是源于生物学领域，在生物界中，灭绝是指一个物种完全消失，不再存在。由于人类活动和其他因素，许多动物物种正面临着灭绝的威胁。

下面是一些关于动物快要灭绝的英文例句及其中文翻译：

"The northern white rhinoceros is on the verge of extinction due to poaching and habitat loss." (北方白犀牛因偷猎和栖息地丧失濒临灭绝。)
"Many species of bees are at risk of extinction due to the use of pesticides and cpmate change." (由于使用农药和气候变化，许多蜜蜂物种面临着灭绝的风险。)
"The panda is still considered an endangered species, with fewer than 2,000 individuals remaining in the wild." (熊猫仍被视为濒危物种，野外仅剩不到2,000头。)

希望这些信息对您有帮助。