steeply

例句：

1. 1. The climb up the mountain was steeply difficult.
   爬山非常困难。
2. 2. She swam the river steeply to reach the other side.
   她陡直地游过河到达另一边。
3. 3. The road is steeply narrow, making it difficult to drive on it.
   这条路陡直狭窄，开车很难。