The express is as swift as an arrow.

快车似箭一般地飞驶。

The lissome birchbark canoe seemed to be a fish, so easily did it cut through the rolling black waves and ranks of ice.

轻盈的桦皮舟像一条大鱼，在滚滚的黑色波涛和冰排中间飞一般地进。