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。
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。
For their critics, Russia's fleet of icebreakers are hastening exploitation of the Arctic.
