1、However, it's in less developed countries that rotavirus causes the worst problems.
然而，在欠發(fā)達(dá)國家輪狀病毒能引起嚴(yán)重問題。

2、China will continue to assist the less developed countries in ASEAN with no conditions attached.
中國愿繼續(xù)在不附加任何條件的情況下援助東盟欠發(fā)達(dá)國家。

3、The speed at which cities are growing in the less developed countries is alarming.
欠發(fā)達(dá)國家城市發(fā)展的速度令人擔(dān)憂。

less developed countries翻譯