The president need not step down so long as the elections are held under international supervision.
只要选举在国际监督下进行，总统就不用下台。 

2.national conference 全国会议

This National Conference on Science is likewise a demonstration of unity.
我们这次全国科学大会也是一次团结的大会。

3.in a row 连续地

It is the sixth month in a row in which imports have fallen.
这是进口量持续下降的第6个月了。

4.drug dealers 毒贩

Drug dealers will not be tolerated in this community.
这个社区是不会容忍毒品贩子的。