US researchers quietly complain about budget restraints and having far fewer icebreakers than Russia, limiting the reach of the United States in Antarctica.
美国研究人员私下抱怨预算受到限制，且破冰船的数量也远远少于俄罗斯，这限制了美国在南极的活动范围。
2
Russia is upgrading its northern fleet, which includes 18 icebreakers.
俄罗斯正在升级它的北海舰队，准备增加18艘破冰船。
3
For their critics, Russia's fleet of icebreakers are hastening exploitation of the Arctic.