A steep barometric gradient indicates().
Farming on steep slopes(陡坡) as well as in dry, windy climates ______ particular soil conservation methods.
Exhausted from a day of hiking across steep, rain-soaked paths, the group of campers were relieved upon the final reaching of the car.
A steep barometric gradient indicates ().
As its name suggests, a box canyon is a small (i) ______ with steep walls on three sides, allowing entry or (ii) ______ from only one direction. Long ago, buffalo hunters might drive a herd into a box canyon, (iii) ______ trapping them and making them easy to butcher.
In shallow water,waves that are too steep to be stable,causing the crests to move forward faster than the rest of the wave,are called().