After a hearty breakfast, my companions and I traveled by snowmobiles a few miles farther north to a rendezvous point where the ice was thinner and a nuclear submarine hovered in the water below.
句意：饱吃了一顿早餐后，我和同伴们一起乘雪防滑汽车北行数英里，到了约定会合地点，那儿的 冰层较薄，水下有一艘核潜艇在那儿徘徊着。hearty丰盛的；衷心的。substantial大量的；结实的。heart-stirring振奋人心的。cordial热诚的；诚恳的。heartfelt衷心的；诚挚的。B选项与划线处意义最为接近，故 选B。