The big losers will be the undeveloped countries, especially in sub-Saharan Africa.
最大的损失者将为不发达国家，特别是撒哈拉以南的非洲国家。
《柯林斯英汉双解大词典》
2
There are many people whose cultures are undeveloped, but the languages they speak are by no means primitive.
有许多人他们的文化不发达，但他们说的语言绝不是原始的。
3
The reason often given for the low regard in which smell is held is that, in comparison with its importance among animals, the human sense of smell is feeble and undeveloped.