In extreme cases, rejection may be so complete that the individual returns immediately to their own culture, regardless of the cost in social, economic or personal terms.
Inextremecases, insurance companies can prosecute for fraud.
在极个别情况下，保险公司会起诉骗保行为。
《柯林斯英汉双解大词典》
2
It is one of the factors controlling the size of competing populations, and inextremecases it may lead to the extinction of one of the competing species.
它是控制竞争种群规模的因素之一，在极端情况下，它可能导致一个竞争物种的灭绝。
3
Inextremecases, you may need the help of your veterinarian.